Instant - Trap, 3UU (5) If an opponent had two or more creatures enter the battlefield under his or her control this turn, you may pay {U} rather than pay Whiplash Trap's mana cost. Return two target creatures to their owners' hands.
Illus. Zoltan Boros & Gabor Szikszai
10/1/2009: You may ignore a Trap's alternative cost condition and simply cast it for its normal mana cost. This is true even if its alternative cost condition has been met.
10/1/2009: Casting a Trap by paying its alternative cost doesn't change its mana cost or converted mana cost. The only difference is the cost you actually pay.
10/1/2009: Effects that increase or reduce the cost to cast a Trap will apply to whichever cost you chose to pay.
10/1/2009: You must target two creatures as you cast Whiplash Trap. If you can't (because just one creature is on the battlefield, perhaps), you can't cast the spell.
10/1/2009: You can target any two creatures, not just ones that entered the battlefield this turn.
Zendikar
(Common)