[Pendulum Effect]

You cannot Pendulum Summon monsters, except "Shaddoll" and "Zefra" monsters. This effect cannot be negated.

[Card Text]

If this card is Pendulum Summoned or sent to the GY: You can target 1 "Zefra" card in your Pendulum Zone, except "Shaddoll Zefracore"; Special Summon it. You can only use this effect of "Shaddoll Zefracore" once per turn.