Reincarnation of the devil.

In Pandora, a world where sorcerers, warriors, and mythical creatures clash, humanity's fate rests on heroes and their leveling system. Akira Ryemon, however, shattered that illusion. A ruthless entity with the devastating ability, Cleave - throwing invisible blades that slice through space, coupled with regenerative healing and Mach 5 speed - he ascended beyond level 200, breaking the very system designed to contain power. Now, the world's most formidable heroes must unite, not against an external threat, but against the protagonist himself. Akira, once a nameless orphan, seeks to dismantle the world that betrayed him, his every move a testament to his cold fury. Can anyone stop the devil who has transcended all limits, or will Pandora fall to the very 'hero' it created?