Hey hey, that's really cool modelling-wise!
Not very fond of the presentation though. If you like, here's my critique.
The different elements (flesh, armor, bones etc.) doesn't feel entirely tied together, thinking of the metal stuff in particular. Due to how clean it is it doesn't feel like it's been used by the character. Some rust or patina would suit it perfectly along with some darkening in the crevices (occlusion bake perhaps) would bring the details forward. Giving it a bit of reddish tint/discoloration would tie it together with the demon more, although if you want it to contrast in terms of material and color, some greenish oxidization would do the trick. Doesn't need to be heavy but even a little would go a long way I think.
The pedestal is way too lores. The rocks are too smooth which breaks the illusion and contrasts badly with the very refine supernice demon. Play around with displacement maps or at least make a nice and crisp normal map for it. They need to bee rougher and more detailed basically.
Same goes for the wooden base.
Adding a simple background would add a bit as well.
Additionally, strewing around some tiny rocks and gravel around the big rocks would help make a transition between them and the ground.
Overall it's a very cool creature, you just need to go the extra mile to make it really super.