Raider's Knight BLGG (Secret Rare)

2 Level 4 DARK monsters (This card is always treated as a "The Phantom Knights" and "Raidraptor" card.) You can detach 1 material from this card; Special Summon from your Extra Deck, 1 "The Phantom Knights", "Raidraptor", or "Xyz Dragon" Xyz Monster that is 1 Rank higher or lower than this card, by using this face-up card you control as material, but destroy it during your opponent's next End Phase. (This is treated as an Xyz Summon. Transfer its materials to the Summoned monster.) You can only use this effect of "Raider's Knight" once per turn.