Some art of Arioch, the demon that gave Jack the power to fight back against his captors and trigger his Shadow Evolution into the Lucario he is today.

It was also the day that Jack discovered he could kill demons where most mortals could not, as well as absorb the souls of slain demons to increase his power.

Arioch has features of a snake, basket star and a snake-mimicking caterpillar, his long wormlike body actually composed of thousands of branching tentacles tightly coiled together. His death was based on a scene from Transformers: Revenge of the Fallen where Bumblebee tears out Ravage's spine.