Warren Warleader

Offspring {2} (You may pay an additional {2} as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.) Whenever you attack, choose one — • Create a 1/1 white Rabbit creature token that's tapped and attacking. • Attacking creatures you control get +1/+1 until end of turn.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6o9wp56ke7pb1h80fx23z5.