Here's the latest edition of the Rulings Summary for Antiquities.
Less than a handful of changes this time.

Please check the General Rulings Summary if you do not find the answer
you are looking for in here.

Note that this is the last version of the rulings summaries under the
Revised Edition.  The next release will be under Fourth Edition rules
changes (if any) and will probably also take a new format.
 
The most recent gg-l/mtg-l digest used was "16 Apr 1995 to 17 Apr 1995".
Credits and disclaimer are at the end of the text.
A '+' is used to mark changes since the last released version on 3/20/95.

These rulings are available via FTP to "ftp.netcom.com" under 
"pub/da/dangelo/magic" as the files "rule-*" in ASCII text, PostScript and 
HP LaserJet format.  The latter two are formatted for easier reading.  
They can also be found on "marvin.macc.wisc.edu" under "/pub/deckmaster/rules" 
as "rule-*".
 
Stephen.
----
Stephen D'Angelo == dangelo@netcom.com 


Antiquities Rulings Summary                            Last Updated 04/24/95
============================================================================
        
Printing Information:
  The Antiquities expansion set was printed with black borders on the face
    of the cards.  Cards can be identified by the expansion symbol on the
    right hand side of the middle section.  The expansion symbol is an
    Anvil.  The set contained 100 unique cards.  Approximately 15 million
    cards were printed.  Cards were available from mid March 1994 through
    late April 1994.

General Rulings:
  Keep in mind that this expansion set was released under the First Edition
    rules and not under Revised Edition.
  None of the new land types are "basic" lands. [bethmo]
  Even though there are now artifact Wards and Circles of Protection, do
    not treat "artifact" as a color.  Artifacts are colorless unless
    xxxxlaced to another color.  It is possible to have a red-artifact
    creature.  [bethmo]
  If a card says you must "choose one of your artifacts in play and place
    it in the graveyard" and you are unable to do so, you may not use the 
    power of that card.  It does not matter if the "choose" text is before 
    or after the ability. [bethmo]
  Cards which read "discard from play" should read "destroy".  [PPG Page
    113]
  If a card destroys itself, this may not be prevented by a regeneration or
    by the Guardian Beast.  This is considered a "sacrifice". [bethmo]
  Cards which read "your" artifacts refer to any artifact you control.

Armageddon Clock:
  During your upkeep, add a counter, then allow people to remove counters, 
    then deal the damage from the clock at the end of upkeep.
    [Duelist Magazine #2, page 15] 
  Players may remove tokens during their upkeeps as well.
    [Duelist Magazine #2, page 15]
  Adding a counter to the Clock is considered an upkeep cost. 
    [WotC Rules Team 10/12/94]

Artifact Possession:
  It does damage whenever the target artifact's activation cost is paid, or
    when it becomes tapped for any other reason.  It does not do double
    damage if the activation cost requires tapping. [Aahz 6/6/94]

Artifact Ward:
  Note that this is not exactly like protection from color abilities. It
    does not prevent artifacts from targeting the creature, it just
    prevents the effects of such targeting, damage from artifacts, and being 
    blocked by artifacts.  [Card Text]
  Does not protect against non-damaging or non-targeted artifacts such as
    Nevinyrral's Disk. [bethmo]

Ashnod's Transmogrant:
  As errata to the card, add the text "The +1/+1 and artifact status are
    represented by a counter". [Duelist Magazine #4, Page 137]  This is
    meant to show that the change is permanent.
  Taps when being used, so it does trigger effects like Powerleech. [Aahz]
+ The token converts permanents to have Artifact nature.  It works even if
    the card stops being a creature, but the +1/+1 bonus only applies when
    it is a creature.  [WotC Rules Team 04/13/95]  (This is a REVERSAL)

Atog:
  Cannot use the ability unless you have an artifact to sacrifice.  It is
    part of the cost. [Aahz]
  The "place in the graveyard" statement is actually a "sacrifice" and is a
    cost which cannot be prevented. [Duelist Magazine #2, page 14]

Bronze Tablet:
  Cannot choose to lose 10 life if you have less than 10 life, but you may
    choose to give up the game immediately.  This has roughly the same
    effect.
  The loss of life cannot be prevented by any spell or effect, including
    the Conservator. [bethmo]
  If the card being targeted by the Bronze Tablet is removed before Tablet
    takes effect, then the Tablet fails to work and remains tapped.
  If using a Copy Artifact on the Tablet, you must trade the Copy Artifact
    card to your opponent just like you would have traded the Tablet.
    [bethmo]
  You can take control of your opponent's Tablet and in the trade you only
    have to give them back their Tablet. [Duelist Magazine #2, page 15]
  Should be read as saying "any opponent". [Duelist Magazine #4, Page 64]
  Has been on the Duelist's Convocation banned list (not allowed in a deck)
    for tournaments since 05/02/94 because it is only used in games for Ante.

Candelabra of Tawnos:
  Note that this is not interrupt speed.  It is a fast effect and will
    resolve along with other effects this instant before you can use the
    lands again. [bethmo]
  You may untap your opponent's lands if desired. [Aahz 5/3/94]  This can
    be useful if Power Surge is in play.
  Cannot target an untapped land. [Aahz 7/27/94]
  Has been on the Duelist's Convocation restricted list (only 1 per deck)
    for tournaments since 05/02/94.

Citanul Druid:
  The rumor that there is a typo with this card is false. [bethmo]
  In multiplayer games you choose one opposing player on casting and it only
    affects that one player.  This target is not changed even if this card
    changes controllers.  It becomes useless but stays in play if the target
    player leaves play. [Duelist Magazine #4, Page 64]

Clockwork Avian:
  Loses a token at the end of the attack phase in which it attacks or
    defends.  [Duelist Magazine #3, Page 22]  This is a REVERSAL of a 
    previous rulings which had it losing its token immediately upon being 
    declared as an attacker or defender.

Cursed Rack:
  In multiplayer games you choose one opposing player on casting and it only
    affects that one player.  This target is not changed even if this card
    changes controllers.  It becomes useless but stays in play if the target
    player leaves play. [Duelist Magazine #4, Page 64]
  If the Limited or Unlimited edition Library of Leng is also in play, you 
    must still discard down to four cards, but you may discard to the top
    of your library.  The Revised Library of Leng skips the discard phase
    entirely and thereby avoids the effects of this spell.

Damping Field:
  Does not prevent artifacts (such as Colossus) from untapping during
    upkeep.
  Artifact creatures are artifacts.  When this in play, they untap as
    artifacts and not as creatures, so only one may untap.

Detonate:
  The damage is from Detonate, and therefore is a red source. [bethmo]

Dragon Engine:
  Pumping mana into this all at once counts as one activation, regardless
    of the amount of mana. [bethmo]

Dwarven Weaponsmith:
  Cannot use the ability unless you have an artifact to sacrifice.  It is 
    part of the cost. [Aahz]
  The "place in the graveyard" statement is actually a "sacrifice" and is a
    cost which cannot be prevented. [Duelist Magazine #2, page 14]

Energy Flux:
  The Guardian Beast will prevent your artifacts from being destroyed, so
    it can make you immune to this effect because the payment is optional.
  Read the word "discarded" as meaning "destroyed".  This is official errata
    to the card. [Duelist Magazine #4, Page 137]

Feldon's Cane:
  Is removed from play when the effect is announced and not when it 
    resolves. [D'Angelo 03/01/95]
  Has been on the Duelist's Convocation restricted list (only 1 per deck)
    for tournaments since 05/02/94.

Gaea's Avenger:
  In multiplayer games you choose one opposing player on casting and it only
    affects that one player.  This target is not changed even if this card
    changes controllers.  It becomes useless but stays in play if the target
    player leaves play. [Duelist Magazine #4, Page 64]

Goblin Artisans:
  The ability is treated as an interrupt because it can counter a spell.
    This is considered errata to the card.  [Duelist Magazine #3, Page 79]
  In multiplayer games you can choose a different opposing player to call the
    coin toss each time it is used. [Duelist Magazine #4, Page 64]

Golgothian Sylex:
  Only affects cards with the Antiquities anvil symbol on them.  It does
    not affect Revised Edition cards that came from the Antiquities
    expansion. [bethmo 6/4/94]
  Creatures may regenerate from being destroyed this way. [Aahz]
  Guardian Beast will prevent Antiquities artifacts from being destroyed,
    but will not stop the Sylex from destroying itself.
  Read the word "discarded" as meaning "destroyed".

Haunting Wind:
  It does damage whenever the target artifact's activation cost is paid, or
    when it becomes tapped for any other reason.  It does not do double
    damage if the activation cost requires tapping. [Aahz 6/6/94]

Hurkyl's Recall:
  Retrieves all artifacts owned by the target player regardless of who
    controls them.  Ignores artifacts owned by other players even if target
    player has control of them.
  Read the word "discarded" as meaning "destroyed".  This is official errata
    to the card. [Duelist Magazine #4, Page 138]

Ivory Tower:
  You can take the bonus life points at any time during upkeep.  This means
    that you may cast spells after gaining life, and that if a Black Vise
    is in play, you may gain life, cast spells, and then take damage from
    the Vise with (hopefully) fewer cards in your hand.
  Has been on the Duelist's Convocation restricted list (only 1 per deck)
    for tournaments since 05/02/94.

Martyrs of Korlis:
  Only one bodyguard can take damage for you during a turn.  Whichever
    bodyguard triggers first will win for that turn.  If the first damage
    which would qualify for either comes from an unblocked artifact creature,
    you have the option of which one takes the damage. [Aahz 10/21/94]
  If a Limited/Unlimited edition Veteran Bodyguard is available as well,
    unblocked artifact creature damage must go to a Martyr because its text 
    overrides the Veteran Bodyguard.  All other unblocked creature damage 
    can and will be taken by your Veteran Bodyguard. [Aahz]
  If a Revised edition Veteran Bodyguard is available, only one of your
    Bodyguards can take damage even if one of the other Bodyguards is a 
    Limited or Unlimited edition one.  This means that you may choose among 
    your various Bodyguards which one takes creature damage (with Martyrs 
    usable for artifact creature damage).  Note that if a Martyr takes some 
    artifact damage (creature or not) then none of the other Revised 
    Bodyguards may take damage for you, even if the damage is not artifact 
    damage.

Mightstone:
  The +1/+0 applies to attacking creatures from all players. [Aahz]

Millstone:
  Library of Leng has no effect on the Millstone since cards are just moved
    to the graveyard.  They are not "discarded". [bethmo]
+ Can be used if the opponent has less than 2 cards in their library.  If so,
    then they lose the game immediately. [WotC Questions 03/28/95]

Mishra's Factory:
  When it is an Assembly Worker, it is still a land and retains all of its
    other abilities. [Duelist Magazine #2, page 14]
  Assembly Worker only lasts until the end of the turn, and then any
    Enchant Creature or Enchant Artifact spells on it are destroyed. 
    [Duelist Magazine #2, page 15]
  Can attack on turn an Assembly Worker is created, but it may not attack
    on the turn the land itself is brought into play. 
    [Duelist Magazine #2, page 15]
  Can only give +1/+1 to one Assembly Worker.  Not all of them.
  Assembly Worker is considered to have a zero casting cost. [bethmo]
  Because turning it into an Assembly Worker is an effect, it is possible
    to power it many times during an instant.  When the instant is
    resolved, the Factory will turn into an Assembly Worker.  Once
    that once it is an Assembly Worker that this will not work.
    [Duelist Magazine #2, page 14]
  When it is an Assembly Worker, it is an Artifact and can therefore be
    stolen by Aladdin.  It is also a creature and can be stolen.  If stolen
    by use of a fast effect, it will not return to you even when it reverts 
    to being a land.  Once a card is stolen, it only goes back to its 
    original controller according to the terms on the stealing card.  
    Note that enchantments which steal cards (such as Control Magic and 
    Steal Artifact) do leave their target if the target is no longer valid. 
    [WotC Rules Team 02/09/95] (This is a REVERSAL)
  An Assembly Worker with Consecrate Land on it follows the rulings outlined
    for Consecrate Land in the Card Rulings Summary.

Mishra's War Machine:
  You may choose to take the damage or to discard.  You cannot avoid taking
    damage if you have no cards to discard. [bethmo]

Mishra's Workshop:
  Has been on the Duelist's Convocation restricted list (only 1 per deck)
    for tournaments since 06/13/94.

Obelisk of Undoing:
  A "permanent" is a land, creature, artifact or enchantment. [Page 17]
  You must be the owner and the controller of the card. [Card Text]
  Only affects one card.  All cards which say "any xxx" mean any single xxx
    in play. [Duelist Magazine #2, page 15]
  Treat this effect as usable on cards you "own" rather than card you "cast".
    [bethmo 8/10/94]
  Read the word "discarded" as meaning "destroyed".  This is official errata
    to the card. [Duelist Magazine #4, Page 138]

Onulet:
  As official errata to the card, it should read "If Onulet goes to the 
    graveyard from play..." [Duelist Magazine #4, Page 138]  This means that
    it does not do anything if discarded or countered.

Orcish Mechanics:
  As errata to the card, it should read "Tap: Sacrifice an artifact.  Orcish
    Mechanics deal 2 damage to any target." [Duelist Magazine #4, Page 138]
  Cannot use the ability unless you have an artifact to sacrifice.  It is
    part of the cost. [Aahz]
  The "place in the graveyard" statement is actually a "sacrifice" and is a
    cost which cannot be prevented. [Duelist Magazine #2, page 14]

Ornithopter:
  The zero casting cost is not a misprint.

Phyrexian Gremlins:
  Only prevents artifact from untapping during untap phase.  Ones that
    untap during upkeep are not inhibited. [Aahz]
  Cannot target a tapped artifact.  This can make them difficult to use on
    mono artifacts because the artifact can be tapped prior to resolving the
    Gremlins and cause the Gremlin effect to fizzle. [WotC Rules Team 9/15/94]
  The target artifact cannot untap if the Gremlins start the untap phase
    tapped, even if it is your artifact and you plan on untapping the
    Gremlins.  [Aahz 6/6/94]
  If the Gremlins somehow become an artifact and then tap themselves, they
    can never be untapped during the untap phase.  They must be untapped by
    an external effect.  [Aahz 6/6/94]
  Effect does not end if the target stops being valid.  For example, if it 
    stops being an artifact. [WotC Rules Team 02/09/95]  (This is a REVERSAL
    of a previous ruling)

Power Artifact:
  Can be cast on artifacts with no or zero activation costs, but this has
    no effect on them.  It does not increase the cost to one. [bethmo]
  For artifacts with an X use cost (such as the Candelabra of Tawnos) this
    reduces the amount spent by 2 to a minimum of 1.
  Only affects colorless activation costs.  Colored mana costs are not
    affected.  This rule comes into play if a card like the Northern
    Paladin gets changed into an artifact by Ashnod's Transmogrant.
  Is considered to alter the activation cost on the card it modifies.  Thus,
    each activation (even if it is multiply pumped) costs the new reduced
    cost. [Aahz 03/03/95]
  Does not affect untap costs, just activation costs. [bethmo]  This
    includes the Basalt Monolith and Colossus of Sardia.

Powerleech:
  Gives one life whenever an artifact is activated or tapped for any other
    reason(including attacking).  If tapping is part of the cost of
    activation, only one life is given. [bethmo 5/3/94]
  In multiplayer games you choose one opposing player on casting and it only
    affects that one player.  This target is not changed even if this card
    changes controllers.  It becomes useless but stays in play if the target
    player leaves play. [Duelist Magazine #4, Page 64]

Priest of Yawgmoth:
  As errata to the card, the text should read "Tap: Sacrifice an artifact you
    own.  Add an amount of black mana equal to that artifact's casting cost
    to your mana pool.  Play this ability as an interrupt."
    [Duelist Magazine #4, Page 138]
  The "place in the graveyard" statement is actually a "sacrifice" and is a
    cost which cannot be prevented. [Duelist Magazine #2, page 14]
  Can sacrifice any artifact you own regardless of who controls it.
  Read the word "discarded" as "destroyed".

Primal Clay:
  Form is chosen on announcement of the spell and not at resolution.
    [WotC Rules Team 12/15/94]
  Ignore the second sentence.  It is just a reminder that other spells can
    change the power/toughness and abilities of the creature. [bethmo]
  Clones and Doppelgangers of this card may not choose a different form
    from the original. [bethmo]

The Rack:
  In multiplayer games you choose one opposing player on casting and it only
    affects that one player.  This target is not changed even if this card
    changes controllers.  It becomes useless but stays in play if the target
    player leaves play. [Duelist Magazine #4, Page 64]

Rakalite:
  Only returns to your hand if it is still in play at the end of the turn. 
    If it leaves play, it does not return. [bethmo]
  Can be used any number of times during the turn before it leaves play.
  Can choose different targets for each use.

Reconstruction:
  The Anvil symbol is missing from this card.

Reverse Polarity:
  Actually removes damage when it gives you life, so you gain nothing by
    casting two of these in a row. [WotC Rules Team]
  When being used to retroactively affect damage, it is not targeted.  This
    means that it can be used even if you have taken no damage this turn,
    in order to waste the spell.  [bethmo 6/6/94]

Rocket Launcher:
  Because tapping is not part of the cost, you can power it many times in
    one turn, but it is destroyed at the end of any turn in which you use
    it. [Card Text]
  Can be powered up for multiple points of damage and count as only one
    "activation" of the artifact.  A single "activation" may have only one
    target.  [WotC Rules Team]
  Can choose different targets for each use. [bethmo]
  Can be animated and enchanted with Regeneration to become reusable.
    [WotC Rules Team 12/15/94]
  It does not sacrifice itself. [WotC Rules Team 12/15/94]  The Guardian Beast 
    can prevent it from being destroyed.  [Aahz]

Sage of Lat-Nam:
  As errata to the card, it should read "Tap: Sacrifice an artifact to draw
    a card." [Duelist Magazine #4, Page 138]
  Cannot use the ability unless you have an artifact to sacrifice.  It is
    part of the cost. [Aahz]
  The "place in the graveyard" statement is actually a "sacrifice" and is a
    cost which cannot be prevented. [Duelist Magazine #2, page 14]

Shapeshifter:
  If it begins upkeep with power of 2 or 1, the Dwarven Warriors may be
    tapped to make it unblockable before you change the Shapeshifter to be
    a 6/1 creature. [Aahz]
  Can only change form once a turn. [Duelist Magazine #2, page 15]

Strip Mine:
  As errata to the card, "place Strip Mine in your graveyard" should read
    "sacrifice Strip Mine". [Duelist Magazine #4, Page 138]
  Tapping is part of the cost of destroying another land, so the Strip Mine
    must be untapped before you use it. [bethmo]
  Consecrate Land and Pyramids will not prevent the Strip Mine from sending
    itself to the graveyard. [bethmo]
  Will trigger Dingus Egg or anything else which triggers on lands being
    destroyed or sent to the graveyard. [bethmo]

Su-Chi:
  As official errata to the card, it should read "If Su-Chi goes to the 
    graveyard from play..." [Duelist Magazine #4, Page 138]  This means that
    it does not do anything if discarded or countered.
  You cannot choose not to get the 4 mana when Su-Chi is destroyed.
  Note that if it dies during damage dealing, you get 4 colorless mana. You
    can only use damage prevention spells and lucky charms at this time, and 
    your mana pool will be emptied (causing "mana burn") once damage 
    prevention is over and before you can use even a fast effect!  So you 
    cannot use this mana to power a Dragon Engine, spell or other fast 
    effect. [bethmo 5/9/94] You can use it on a Soul Net or as part of a 
    damage prevention spell like Guardian Angel.

Tablet of Epityr:
  Only works when artifact goes to the graveyard from play, not from a
    player's hand.  At that time, the card is not an artifact.  [bethmo]
  Cannot be used on itself because it is used after an artifact goes to the
    graveyard.  [Aahz 6/6/94]

Tawnos's Coffin:
  All damage and scheduled destruction (i.e. dies at end of turn) are
    removed when the creature goes out of play. [Duelist Magazine #2, page 15]
  Note that token creatures which are removed from play leave the game
    permanently. [Duelist Magazine #2, page 15]
  Remember that the creature, when removed from the Coffin cannot attack or
    be tapped until you begin a turn with it in play.
    [Duelist Magazine #2, page 15]
  If a creature enters the Coffin, then exits it during the same turn, it
    is considered the same creature and if it was in play at the start of your
    turn you may use it.  [Aahz 9/2/94]
  A creature in the Coffin is considered to be in suspended animation.  When
    it returns, you need not pay any costs or deal with any effects that
    happen because the creature re-entered play.  For example, you do not
    choose a new creature for a Clone or sacrifice Forests to a Wood Elemental.
    [WotC Rules Team 9/15/94]
  Creatures like Stangg and Hazezon Tamar which get token creatures when they
    enter play do not get those creatures when they re-enter.
    [WotC Rules Team 9/15/94]
  The creature returns to play, and if not already tapped, it taps at that 
    time.  This does cause any effects which trigger off the creature becoming
    tapped. [WotC Rules Team 9/15/94]

Tawnos's Wand:
  The second sentence should read "after the Wand is used" instead of
    "after defense is chosen".

Tawnos's Weaponry:
  There is a variant of this card on which the colorless mana circle is
    missing behind the activation cost.

Tetravus:
  When the counters are off the Tetravus and acting as 1/1 Flying artifact
    creatures, they are token creatures and follow the rules of token
    creatures. [bethmo]  See the Token Creatures section of the General
    Rulings Summary for more information.
  A token creature cannot attack on the turn it enters play. [Page 26]
  If the Tetravus is destroyed when the Flyers are off the card, they are
    not destroyed, they are just orphaned. [bethmo]
  Counters can only be moved back to the same Tetravus they came from.
    [Duelist Magazine #2, page 15]
  Moving a counter on or off the Tetravus is a fast effect.  You can move 
    as many as you want during upkeep, but each can only be moved once.  
    [WotC Rules Team 10/12/94]
  Orcish Oriflamme and other non-targeted effects can enhance the token
    creatures. [bethmo]
  A Clone of Tetravus does get the counters since this is done at casting
    time.  A Doppelganger only gets tokens if it copies the Tetravus at
    casting time and not as a later doppel effect. [WotC Rules Team 7/27/94]
  If your opponent controls some of the token creatures, you can still
    merge them back into the Tetravus and effectively get them back.
    [WotC Rules Team 10/12/94]
  Merging them back in erases all changes and effects of any sort from the 
    token creature. [WotC Rules Team 10/12/94]

Titania's Song:
  This spell effectively cancels out all the text in the textbox of the card.
    All abilities are lost. [bethmo 9/22/94]
  This spell's effect is not prevented by the Guardian Beast. [bethmo]

Transmute Artifact:
  As errata to the card, the first sentence should read "Sacrifice an artifact.
    Search through your library for one artifact and immediately place it into
    play." [Duelist Magazine #4, Page 138]
  Additional mana spent to cover the differences in casting costs is not
    part of the casting cost of this spell for Spell Blast or any other
    reasons. It is spent during spell resolution.  [bethmo]  If it is not
    spent, the spell fizzles and the sacrificed artifact is placed in the
    graveyard.
  The target is the only casting decision.  Picking an artifact is part of
    the resolution. [bethmo]
  The one from the library enters play when the spell is resolved, and this
    does not count as the casting of an artifact or destruction of an
    artifact.  It will not trigger off events which Urza's Chalice or
    Citanul Druid can react to. [bethmo]

Triskelion:
  It is legal to attack (or defend) with the Triskelion and then after the
    attack use some of the +1/+1 tokens to do damage to a creature.
    [bethmo]
  Can still use its ability even when tapped because this is a creature
    ability.
  Can be used any time a fast effect is legal and not "any time" as the
    card says.
  Tokens can be used on the turn it enters play because it does not require
    tapping. [bethmo]

Urza's Avenger:
  The -1/-1 is not permanent.  It lasts until the end of the turn as do the
    abilities that give the -1/-1. [Duelist Magazine #2, page 15]

Urza's Chalice:
  May not be used on itself just after it is cast. [Aahz 7/27/94]
    This is a REVERSAL of a previous ruling.

Urza's Mine:
  If you have at least one of each of the three Urza's lands in play, you
    must take the 2 mana instead of just one. [Duelist Magazine #2, page 15]

Urza's Miter:
  As errata to the card, the last sentence should read "May not be used when 
    an artifact was placed in the graveyard due to being sacrificed."
    [Duelist Magazine #4, Page 138]
  Only works when artifact goes to the graveyard from play, not from a
    player's hand.  At that time, the card is not an Artifact.  [bethmo]
    Must be the controller of the artifact to use this.
  Cannot be used on itself because it cannot be used after it goes to the
    graveyard.

Urza's Power Plant:
  If you have at least one of each of the three Urza's lands in play, you
    must take the 2 mana instead of just one. [Duelist Magazine #2, page 15]

Urza's Tower:
  If you have at least one of each of the three Urza's lands in play, you
    must take the 3 mana instead of just one. [Duelist Magazine #2, page 15]

Wall of Spears:
  The card says "Counts as a wall" and it means that it is a Wall in all
    ways. [bethmo 5/3/94]

Weakstone:
  The -1/-0 applies to attacking creatures from all players. [Aahz]

Xenic Poltergeist:
  Allows the creature to attack as long as the artifact began play on your
    side this turn. [bethmo]
  Wears off at the beginning of the upkeep, not during upkeep. [bethmo]

Yawgmoth Demon:
  As errata to the card, it should be read as "Flying, first strike.  Sacrifice
    an artifact during your upkeep or Yawgmoth Demon becomes tapped and deals
    2 damage to you." [Duelist Magazine #4, Page 138]
  The sacrificing of an artifact is not mandatory.  You can choose not to 
    sacrifice an artifact but will pay the consequences.  [Aahz 11/02/94]
  The "place in the graveyard" statement is actually a "sacrifice" and is a
    cost which cannot be prevented. [Duelist Magazine #2, page 14]
        
Acknowledgments:
  This summary is collected from rulings made by officials and network
    representatives of Wizards of the Coast, along with a number of
    unofficial rulings also collected from the net.  Whenever a source for
    a ruling is known, the name of that person is listed with the ruling. 
    "D'Angelo" is Stephen D'Angelo, the network representative for the
    "mtg-l" mailing list.  "Peterson" is Paul Peterson, the previous "mtg-l"
    representative.  "bethmo" is Beth Moursund, the representative before
    Paul.  "Aahz" is Tom Wylie, the network representative for
    the "rec.games.deckmaster" and "rec.games.trading-cards.magic.*"
    newsgroups.  "Snark" is Dave Howell of WotC.  Official rulings from the
    rules team are marked as "WotC Rules Team".  Rules from the Revised
    Edition rule book are marked with "Page #" and rules from the Pocket
    Player's Guide are marked with "PPG Page #"
  Every attempt has been made to make this summary accurate, but errors do
    creep in.  This work should not be considered official or sponsored by
    Wizards of the Coast.  Nothing in this work is guaranteed to be accurate.
    Use at your own risk.
   Magic: The Gathering, Antiquities and all of the cards listed herein are
    copyrighted by Wizards of the Coast.
