This is super power form of Younger Toguro. With each increase comes a burst of demon energy and his muscles thicken and enlarge themselves. At this super power, his appearance changes drastically, affecting even his skin color, but requires him to feed on souls to maintain such immense power, which leads him to suck out the souls of the weaker creatures in the surrounding area through special appendages on his upper back. He also has the ability to move fast enough to not be seen.
He was one of the most powerful villain during the Dark Tournament. Fanart of Yu Yu Hakusho series.