Ogrémoch

Orgémoch, also known as the Prince of Evil Earth, was a powerful archomental from the Elemental Plane of Earth. Within the Plane of Earth, in a cavern deep underground filled with black crystals and jagged rocks, the Prince of Evil Earth made his lair.

Description
Orgémoch is described as a massive humanoid made of rock and crystal.

Personality
Orgémoch was a miser, regarding all resources and treasure within the earth as his. This was not because he needed the wealth, but because of the principle of the thing. What he could not crush under is massive form, he outlasted.