Dreamkiller

This is Raylight, an embodiment of a sunbeam that awakens people from dreams. He is considered a type of Death because the dream worlds he destroys are rather real to him. He could not destroy a normal world outright, however. The thing about dreams is that while large ones are invincible, small ones are easy to snuff out, and as you can see it's small ones he destroys.

In combat he turns into the giant hairdragon thing shown. He fights using his corruption ability and biting/eating/slamming and such. He can fly in both forms. He is weakest against ice and cutting and strongest against fire, light, dark, and projectiles (projectiles would just pass through, mostly while the first three are much like his own essence and one must use a huge, overwhelming amount for an effect).

He doesn't realize that his core is pure darkness. He loves bright light, color, and beauty, and doesn't seem to care about anything but himself. He rarely opens his eyes and he wears white makeup.