The fact he has green magic is not at all related to Hulking out.
When I designed him, I just didn't want him to have blue eyes because of reasons.

This is my pirate captain, Falcos.
You... don't want to piss him off. It takes a lot of doing to get him to this point, but still... he is technically half-sired... which in my lore-verse, technically makes him a demi-god. So... yeah...
There's going to be some rough sailing ahead.