This is my character/fursona enraged because of his uncontrollable power. Glytheum, which is a power source, that flows through his body can stress the body, mutate it, then kill it if you use too much of its power. When Raph uses too much, the mutation is this: a werewolf-like form. The orange stuff in his left hand is pure glytheum~

Here's a story snippet that shows a scene with this scenario: http://iraph-studios.com/download/raph\_glytheum\_mode.html

More about my story: http://theglytheumstate.com/