Swiftness

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.)