Activate this card by targeting 1 monster your opponent controls; it cannot attack or change its battle position. When it leaves the field, destroy this card. During each of your Standby Phases: Inflict 500 damage to your opponent. That monster must be on the field to activate and to resolve this effect.
Wrong. It's actually better then Mask of the Accused since it can be used to negate an attack. It also prevents the opponents monster from chancing it's battle position which is something mask of the accused doesn't prevent and makes it more useful against clowns. Lastly it can be activated whenever you want.