Ambush [②] (You may pay ② to play this card from your hand face-down at one of your forts.) (You may pay ② to play this card from your hand face-down at one of your forts.) When this creature is summoned, your opponent chooses one of their creatures, and returns it to their hand. When your opponent's cost 4 or greater creature is summoned and this card is an ambush, you may summon this creature.