Pendulum Effect

You cannot Pendulum Summon, except from the Extra Deck. This effect cannot be negated. Each player applies 1 of these effects based on the number of Set cards in their Spell & Trap Zones.

0: All monsters they control cannot attack or activate their effects.

4 or more: The ATK of all monsters they control become double their original ATK.

Monster Effect

If either player Sets a Spell/Trap on your field while this card is in your GY (except during the Damage Step): You can place this card in your Pendulum Zone.