Advanced format ruling
The Six Samurai - Irou
Card effect (current official text)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.
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.