Metal Lifeform: Dragon (TUS-075 N) [The Underworld of Secrets]

[Flying] [Fusion] (Metal Lifeform) (As you play this card, you may target a Metal Lifeform J/resonator. If you do, this card becomes an addition and after resolving enters the field as an addition added to the chosen target. As long as the chosen target is a J/resonator, it gains [+X+Y] and all non-[Fusion] abilities of this card, where X is the ATK of this card and Y the DEF of this card.) RU, remove this card in your hand from the game: Rest target entity. It doesn't recover during its controller's next recovery phase. Then this card deals 200 damage multiplied by X to your opponent, where X is the number of cards in your opponent's hand.