Everlasting Duality

Leon was found barely conscious inside a ruined laboratory before he was taken in by the authorities. He couldn't remember his past or what he had done there. While being questioned, he lost consciousness... only to wake up again in completely foreign, barren environment, inhabiting a grotesque, demon-like body. Overwhelmed and clouded by a strange and powerful desire to destroy and kill, his movement guided by instinct, he could barely realize what was he was doing before collapsing again, only to wake up in his human body, in a hospital. Before he could realize what happened, a panel appeared in from of him, signifying the activation of a system. [Conditions have been met.] [System has been activated.] [Essence has been accumulated during the Demonic Cycle, would you like to distribute it?]