Brotherhood

An ominous brotherhood of religious fanatics perform experiments on humans in their top-secret scientific complex. An ancient prison hidden deep in the Swiss mountains houses hundreds of test subjects whose bodies are mutilated in an effort to produce a new biological species of superhuman.

You are one of them, but unlike other test subjects, your body is immune to mutagens. For you, it's not poison anymore, rather a source of power that makes your body nearly indestructible.