Life Sentence? I Devour Sin to Become a God!

Framed by a ruthless family and betrayed by the woman he loved, he's thrown into a maximum-security hellhole with no hope of escape. But when a mysterious system awakens within him, the prison transforms from his tomb into his hunting ground. Every criminal becomes experience points. Every sin becomes power. The prison boss who tried to humiliate him? Eliminated. His martial artist enemy worth ten thousand sin points? The perfect breakthrough fuel. And when a demonic cultivator with half a million sin points arrives in the next cell, it's not a threat—it's an opportunity. In this concrete cage…