Ritual Beast Ulti-Pettlephin [THSF-EN029] Secret Rare Water neither player can Xyz Summon

neither player can Xyz Summon using monsters with a different Level from the Monster Revealed as Xyz Material

the latest core booster for the Yu-Gi-Oh

you can Special Summon it (from your hand)

Special Summon Level 4 or lower Dinosaur-Type monsters from your Deck

Ritual Beast Ulti-Pettlephin [THSF-EN029] Secret Rare Water neither player can Xyz SummonSet: The Secret Forces Card type: Fusion Effect Monster Rarity: Secret Rare Attack: 200 Defense: 2800 1 "Ritual Beast Tamer" monster + 1 "Spiritual Beast" monster Must be Special Summoned (from your Extra Deck) by banishing the above cards you control, and cannot be Special Summoned by other ways. (You do not use "Polymerization".) Cannot be destroyed by card effects. During either player's turn: You can return this card to the Extra Deck, then target