الطائر المغير - عقاب الجمجمة

If this card is detached from an Xyz Monster and sent to the Graveyard to activate that monster's effect: You can banish this card from your Graveyard, then target 1 "Raidraptor" card in your Graveyard; add it to your hand. You can only use this effect of "Raidraptor - Skull Eagle" once per turn. An Xyz Monster that was Summoned using this card on the field as Xyz Material gains this effect.
● If it is Xyz Summoned: It gains 300 ATK.