Goblin Thief

When Goblin Thief enters the battlefield
gain control of target artifact. Untap it. It
gains haste and "At the beginning of each
end step, if you don't control a creature
named Goblin Thief, sacrifice this artifact."
Evoke {r} (You may cast this spell for its
evoke cost. If you do, it's sacrificed when it
enters the battlefield.)