[REQUIREMENT] Shuffle 3 Dragon monsters from your GY into the Deck.
[EFFECT] Choose 1 face-up monster you control. During this turn, that monster gains 900 ATK and your opponent cannot activate Trap Cards when that monster declares an attack, then, you can choose 1 “Dragonic Slayer” in your GY and Special Summon it to your field in face-up Defense Position.