Qasali Ambusher is a uncommon Creature — Cat Warrior card from Shards of Alara (ALA), collector number 184. Current market price: $0.65 (foil $4.18), TCGplayer market prices via Scryfall.
Reach If a creature is attacking you and you control a Forest and a Plains, you may cast this creature without paying its mana cost and as though it had flash.