japanese: Konton no akuma
english: Chaos demon or simply Chaos
streching out like a barren desert of black and grey sand and stone with a single castle resting on the black surface with a throne of skulls, the sky changes from blood red to deep purple to black over the day, dark grey clouds float across the sky in small clumps.
release phrase to shikai: "Reap their souls, Konton no akuma"
Zugaikotsu nami o sakebu (screaming skull wave)
by gathering spirit energy into the blade then swinging the blade, it releases a purple wave of energy that emits a loud scream as it flies, with skulls occasionally pushing out of the wave with their jaws wide open emitting the scream.
Ankoku kōtei kaosu akuma (dark emperor chaos demon)
Sen zugaikotsu no ikari (rage of a thousand skulls)
the eyes of the 4 skulls on the sword glow when the attack starts, a more powerful version of screaming skull wave, it releases a wave of purple energy of increased strength. after each attack the eyes of a skull go out, since the bankai is in it's infant stage it can only perform 4 Sen zugaikotsu no ikari before the bankai dissappears.