Trying to source a good skin texture for final boss

[morrowind1979]

Wondering if anyone knows of any good evil/demonic skin texture resources I can use for my final boss in my new mod. He is a big demonic incarnation of a planet. What I am looking for is sort of a cross between the diablo 3 diablo face texture and a lava cracks texture. Been scouring google for hours but can't find anything suitable.