Old art.
Golems! Golems in my story are much like robots only instead they're made with magic energy. They follow programmed commands. Most golems have a central crystal which functions as a central control unit and a energy holding structure. Golems can only be destroyed by damaging the central crystal, damage to the outer structure won't do much.
This is a molten golem. The molten golem is made out of lava and some stone structures and obsidian with it's central crystal that looks like a eye at the center of the solid structure. The top looks like a small volcano with ash clouds coming out of it, possibly some heat reaction chamber controlled by the central crystal. Molten golems are able to regenerate their body as long as the central crystal isn't damaged too much. It can either use solid structures such as blades as weapons or use the lava body to attack.

(this) molten golem and art © Raikuen