I like that you added the size comparison at the side and actually gave him a good look rather than just a silhetto of a nude bloke I am a big fan of that creature he looks really cool and damn aggressive, wicked touch with the human heads in one hand and all the battle damage he has. I love the weapon too, its a very old style Japanese weapon if I am correct? Wonderful work on the tusked teeth and the horns as well, the clothing is simply wicked and I love his big belly Nice to see fat strength rather than being super muscler.
Very nice work on those colors! My one crit would be to remove the texture from the belly. Skin usually only wrinkles on areas where the skin gets folded and compressed, and a on a fat belly the skin is always stretched.
Hm, for demon scribe lines I might go for something more regular and complex. Even at higher resolution it kinda looks like a bunch of circles. Might check this out: [link] And no problem, the rest of the concept is solid. I can see what you're going for now with the lines, I think it just needs to be overstated a bit more.