Crystalline Behemoth

''"That gigantic thing, it seemed to appear out of nowhere and do battle with the Imperials' own monstrosity. The battle is doomed..." ~ Union soldier''

The crystalline behemoths are a type of higher demon of The Abyss. They serve the Shadows of the Horizon and are rarely seen on the Prime plane.

Appearance
Crystalline behemoths are hulking monstrosities of great size, easily reaching over 60 meters in length. Their bodies are constructed of symmetrical, deep purple to black crystals. They have large, elongated heads with no visible eyes, consisting of two large pyramid-shaped crystals layered one on top of the other. They walk on their knuckled, but can stand up and walk bipedally for short periods. Their torsos are front-heavy, with a small waist consisting of several flat crystalline structures layered in a similar fashion to a spinal column.

They exhibit extreme raw strength simply due to their enormous size, being able to easily tear through solid stone walls and fortifications. Their level of intelligence is unknown.

Origins
The crystalline behemoths are abyssal beings and thus their origins are shrouded in mystery. They are said to be one of the most powerful creatures in the Abyss, being in the classification right under the Shadows of the Horizon themselves.

Greenflow Arc
The crystalline behemoths are first alluded to in the book "Shadows beyond our comprehension" by Felkin, the Stargazer when it falls into the possession of the first nameless brotherhood. There they are described as higher demons, being high up in the abyssal hierarchy.

Shores of the Void Arc
A single crystalline behemoth is shown to have been summoned during the battle at Bryaglee, destroying a large portion of the castle and engaging in a three-way confrontation with the sky dragon and several of the false gods. The behemoth is presumably returned to the void after the conclusion of the battle.