The Six Samurai - Irou - STON-EN012 Common 1st Edition

At the start of the Damage Step, if this card attacked a face-down Defense Position monster: Destroy that monster. You must control a face-up "Six Samurai" monster with a different name to activate and to resolve this effect. If this card would be destroyed, you can destroy another face-up "Six Samurai" monster you control instead.