Pendulum Effect
You cannot Pendulum Summon monsters, except "Yang Zing" and "Zefra" monsters. This effect cannot be negated.
Monster Effect
When this card is Pendulum Summoned, or when this card is destroyed by battle or card effect while in your Monster Zone: You can add 1 "Yang Zing" or "Zefra" Spell/Trap Card from your Deck to your hand. You can only use this effect of "Zefraniu, Secret of the Yang Zing" once per turn.