Instantáneo
Las criaturas que controlas obtienen +2/+0 hasta el final del turno. Siempre que una criatura que no sea ficha que controlas muera este turno, crea una ficha de criatura Rata negra 1/1 con "Esta criatura no puede bloquear".
Only creatures you control when Gnawing Crescendo resolves will get +2/+0. However, if a nontoken creature enters the battlefield after Gnawing Crescendo resolves and then dies while under your control later that turn, you'll create a Rat token.