Apply this effect, depending on whose turn it is.
-Your turn: Target 1 "Raidraptor" Xyz Monster you control; Special Summon from your Extra Deck, 1 "Raidraptor" monster that is 1 Rank higher than that target, by using that target as the Xyz Material. (This is treated as an Xyz Summon. Xyz Materials attached to it also become Xyz Materials on the Summoned monster.)
-Your opponent's turn: Target 1 face-up Xyz Monster your opponent controls that has no Xyz Materials; take control of that face-up Xyz Monster your opponent controls, then Special Summon from your Extra Deck, 1 "Raidraptor" monster that is 1 Rank higher than that monster you control, by using it as the Xyz Material. (This is treated as an Xyz Summon. Xyz Materials attached to it also become Xyz Materials on the Summoned monster.)