Oni

"Oni" (精神 Ketsuki) is an archetype of Level 4 Zombie-Type monsters. Their playstyle revolves around detaching 1 Xyz Material from a monster on the field (either your or of an opponent's) to Special Summon 1 Level 4 Zombie-Type monster from your Graveyard ("Blue-Blooded Oni"), to increase a face-up Zombie-Type monster's Level by 1 and its ATK by 300 ("Red-Headed Oni") or to reduce the Rank by 1 and ATK by 300 of a face-up Xyz Monster on the field ("Yellow-Blooded Oni").