Oni Magic

Oni Magic (鬼魔法, Oni Mahō) is a high level Transformation Magic used by Orion, Guild Master of the Dark Guild Leviathan's Eye.

Description
To activate this magic, the user must first form several tendrils from their body that bear forked ends. Using these tendrils, the user absorbs the life force from anything around them, be it sentient or not, and converts the energy into fuel. Upon absorption of a sufficient amount of energy, the user begins to transform into a child-like form resembling an Oni from ancient mythology. The life force that has been absorbed from the surrounding area is stored in the Oni's horns, causing it to pulsate with a bright light that can be fired off in massive blasts, causing tremendous damage.