Arbalest Elite

Oracle Text

2W, T: Arbalest Elite deals 3 damage to target attacking or blocking creature. Arbalest Elite doesn't untap during your next untap step.

Card Rulings

9/22/2011 If the creature is an illegal target when Arbalest Elite’s ability tries to resolve, the ability won’t resolve and none of its effects will happen. Arbalest Elite will untap during its controller’s next untap step.
9/22/2011 If another player controls Arbalest Elite during your next untap step, the part of the effect that keeps it from untapping does nothing. It won’t try to apply during a future untap step.

Additional Information