2 printings listed in our catalog, from newest to oldest.
, 
: Untap target artifact an opponent controls and gain control of it until end of turn. It gains haste until end of turn. When you lose control of the artifact, tap it.No reference price for this printing yet: not enough stores to make an average.
Run a comparison: we query the stores live, it may have arrived this morning.
You may target an untapped artifact with this ability.
2004-10-04 · Wizards of the CoastThe artifact taps after returning to the opponent (if it is not already tapped), so any abilities triggered off it tapping happen at that time.
2004-10-04 · Wizards of the CoastYou tap the artifact when you lose control of it for any reason — because Magus of the Unseen’s effect ends, or because a spell or ability causes another player to gain control of it.
2008-10-01 · Wizards of the CoastThe artifact will gain haste whether or not it’s a creature. Of course, if it’s not a creature, haste will have no particular effect.
2008-10-01 · Wizards of the Coast
Enter the Battlefield · Condition MP
Jeux 3 Dragons · Condition MP
