Éphémère : piège
Si au moins trois créatures attaquent, vous pouvez payer

à la place du coût de mana du Piège à léthargie.
Les créatures attaquantes gagnent -3/-0 jusqu'à la fin du tour.
Effects that increase or reduce the cost to cast a Trap will apply to whichever cost you chose to pay.
Casting a Trap by paying its alternative cost doesn't change its mana cost or mana value. The only difference is the cost you actually pay.
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.