Oracle

Instant - Trap 

If an opponent had two or more creatures enter the battlefield under their control this turn, you may pay U rather than pay this spell's mana cost.
Return two target creatures to their owners' hands.

NederMagic FAQ

Vraag: Wallpaper?
Antwoord: hier

Tournooi-info

Legal in: Vintage, Legacy, Modern, Commander

Officiele rulings

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.

Decktips