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Cannot be Normal Summoned/Set. Must first be Special Summoned (from your hand) by shuffling 1 "Ryzeal" monster from your hand or GY into the Deck/Extra Deck. You cannot Special Summon from the Extra Deck, except Rank 4 Xyz Monsters. Once per turn, during damage calculation, if this card battles an opponent's monster: You can send 1 Level 4 monster from your hand or Deck to the GY, and if you do, this card gains ATK equal to that monster's ATK, until the end of the Battle Phase.