You can’t cast CARDNAME unless an opponent lost life this turn.

Flying, trample

Creature spells you cast cost {1} less to cast for each 1 life your opponents have lost this turn.

除非本回合中有對手失去過生命，否則你不能施放CARDNAME。

飛行，踐踏

對手本回合中每失去過1點生命，你施放的生物咒語便減少{1}來施放。