When this card is activated: Add 1 "Zefra" monster from your Deck to your hand. When you Ritual Summon using a "Zefra" monster, or Special Summon using a "Zefra" monster as Material, you can activate these effects depending on the monster Summoned, once per turn per effect:

?Ritual: Shuffle 1 monster on the field into the Deck.

?Fusion: Special Summon 1 monster from your hand.

?Synchro: Choose 1 monster from your Deck and place it on top of your Deck.

?Xyz: Draw 1 card, then discard 1 card.

You can only activate 1 "Oracle of Zefra" per turn.