Buy @ TCGplayer
Flash (You may cast this spell any time you could cast an instant.)
Whenever you cast a spell during an opponent's turn, put a +1/+1 counter on Brineborn Cutthroat.
Brineborn Cutthroat must be on the battlefield for its last ability to function. Notably, the ability won’t trigger as you cast Brineborn Cutthroat during an opponent’s turn.
Brineborn Cutthroat’s ability resolves before the spell that caused it to trigger. It resolves even if that spell is countered.
