Ok, I have the idea of him being human like at the beggining, then when you get to the temple or castle or where he is, he transforms into a white devil (Light) whith a sword. then his second transformation would be him being bigger and stronger and darker (darkness) and have four arms with sharp claws. he attacks by trying to h you when you are close to him, and shoots darkness at you that paralises you and dark link, giving him the chance of hitting you. he has a hole that has a heart that you have to hit, but would be difficult to hit him. his horn turn red or blue when he is going to shoot fire or ice. What do you think?
P.S Leduardo this is awsome