Diabolus

Diabolus (悪魔 (ヂアボロス) Akuma (Diaborus)) is a Take Over spell used by Blake Nogami.

Description
Acquired from an unusual skeletal magical being, Blake notes it's one of the most versatile of his transformations. An immense influx of magical energy goes through his body before changing most of his appearance entirely. His top is removed entirely, his skin goes a deathly pale and his blue hair is slightly longer and is kept much smoother, along with his attire consisting of a single pair of hakama and a large purple belt at his waist. The most prominent part of his appearance being changed are his eyes' irises being inverted along with the protrusion of several bones throughout his body. Blake remarks it can only be used once every 6 hours.

Abilities
Regeneración (再生 Saisei, lit Spanish/Japanese, Regeneration) an ability achieved through Diabolus is the constant reproduction of all forms of cells in the body; including skin cells, bone cells, tissue cells, blood cells and every other possible cell. This is done by accelerating this process through the influx of magical power in the body; thus allowing him to continually regenerate from every wound as long as he has sufficient magical power to back it up.

Esqueleto Rey (骨格王 Kokkaku-ō, lit Spanish/Japanese, Skeleton King) the ability to completely manipulate his own skeletal structure. Diabolus has shown this unique ability via the influx of magical power into his calcium, allowing him to manipulate the calcium in his body and by extension his very skeletal structure. Because of this; Blake's body has adapted and reformed to have an alternate and very unique skeletal system. This allows him to protrude bones from his entire body and allow him to even manipulate their mass and size accordingly. He uses this expertly in close combat along with his own finesse to defeat his opponents.
 * Cementerio (墓地 Bochi, lit Spanish/Japanese, Graveyard) a technique in which he is capable of using fossils buried deep into the ground as a catalyst for this technique. Altering their calcium levels significantly, he may cause them to protrude at an exceptionally large size from the ground. From this he is able to use these in conjunction with his own skeletal structure in order to attack his opponent from virtually all angles without any effort.