Stratosfear - Above the clouds skin contest entry

Ladies and Gentlemen
I now present to you:
Stratosfear!
Warrior of the Sky

Lore:
Stratosfear was once an angel, but has fallen from grace.
He wished to remain in the sky, however, so he made a pact
with the god of the undead, Mortos.
He soon regretted the pact, however, as 
it left an ugly scar... But was it just a scar?
In the millenia following, He noticed
the eye-shaped scar on his skull was
....... Spreading?