Corruption

The pentagrams burned hotter than ever, burning not only his physical body, but his spiritual body as well. His mind was frantic, "They've found me, but so quickly... how?" The pain was unbearable, and he slowly felt control slipping further and further beyond his mortal grasp...

Hiei's mind shattered like a mirror dropped from a high belfry. Black smoke engulfed him, choking him. Control was a distant hope now, Hell's greater demons had seized everything, his mind pushed into a far corner and forgotten. he could only watch as they used his body like a puppet.

More of Hiei Umbra (are the constant clothing changes annoying yet?) after he's corrupted by greater demons (he's only half-demon, thus he cannot hope to stand against a top class like the greaters) as he tries to summon his shadow powers.