A redeemed criminal where his past had caught up to him. Experimented on, injected with chemicals. His mind and memory eventually lost to all the pain and suffering. Even having his arm severed and reattached.
Eventually death came as a release, or so he thought.

The injected chemicals and machinery finished his transmutation into the beast as his heart stopped.
The pumps and chemicals in his body forcefully restarted his heart and his mind was snapped back from oblivion.
A chemical chamber on his back was integrated with his nervous system. Whenever he felt rage, or hate, or fear, it would drive liquid fury deeper into his veins, fully awakening the beast within.

Now he finds himself in an unknown land by unknown means.
Can he find the man that was lost long ago, or will the beast consume all?