Target 1 "The Phantom Knights" or "Xyz Dragon" monster in your GY or banishment; Special Summon it, but negate its effects, then apply the following effect.
• Choose 1 DARK Xyz Monster you control, and Special Summon from your Extra Deck, 1 "The Phantom Knights" or "Xyz Dragon" Xyz Monster that is 1 Rank higher than that monster, by using it as material (this is treated as an Xyz Summon, transfer its materials).
You can only activate 1 "The Phantom Knights' Rank-Up-Magic Requiem" per turn.