Longstalk Brawl

Gift a tapped Fish (You may promise an opponent a gift as you cast this spell. If you do, they create a tapped 1/1 blue Fish creature token before its other effects.) Choose target creature you control and target creature you don't control. Put a +1/+1 counter on the creature you control if the gift was promised. Then

those creatures fight each other.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6om0omg0oppb1h5mj852mj.