Spirepalace Ambusher

When Spirepalace Ambusher attacks, defending player discards a card. If they discarded a land card, you may search your library for a basic land, and put it onto the battlefield. If they discarded a creature card, return a creature from your library to the battlefield. If they discarded a instant or sorcery card, add {b}{b} at the beginning of your next main phase. If they discarded a artifact or enchantment card, put a +1/+1 counter on each other creature you control. If they discarded a planeswalker car