Artifact, 4 (4) You may choose not to untap Tawnos's Coffin during your untap step. {3}, {T}: Remove target creature and all Auras attached to it from the game. Note the number and kind of counters that were on that creature. When Tawnos's Coffin leaves play or becomes untapped, return the removed card to play under its owner's control tapped with the noted number and kind of counters on it, and if you do, return the removed Aura cards to play under their owner's control attached to that permanent.1
Illus. Christopher Rush
The card returns to play as a new permanent. [D'Angelo 2007/09/08]
The permanent does have summoning sickness after it returns. [D'Angelo 2007/09/08]
If the card was only a creature due to an effect, it may enter play as a non-creature since it enters play as if newly played. [D'Angelo 2007/09/08]
If an Aura cannot be attached to the permanent after it re-enters play because it would be illegal to do so, the Aura remains removed from the game. [D'Angelo 2007/09/08]
The creature returns to play tapped. It does not return to play and then tap afterwards. [WotC Rules Team 1997/06/01]
Extended tournaments (see Rule 803) have always banned this card.
Note - Due to errata, it is of type "Artifact" and not "Mono Artifact".
Antiquities
(Rare)