Talk:Stygian/@comment-33142536-20171115171032/@comment-1031724-20180111030829

The darkness inside him is a symbiote. If you haven't read or seen anything Spiderman with symbiotes in it: They're creatures that fuse with a person (or pony), so that person is dominant but under the symbiote's influence. If it makes sense. Often the symbiote will fight on its own to prevent separation.