Gehreleth

Gehreleths are spawned from the decaying bodies of beings that have traveled to the Lower Planes and died there. Some unidentified evil power gives them life and motivates them to destroy. They produce nothing of value and serve no purpose to anything around them.

Gehreleths inhabit Carceri, part of the killing grounds in the eternal Blood War. However, these fiends take no part in the conflict, instead roaming Carceri as random agents of destruction. Gehreleths look disgusting and unsightly.

The gehreleths are the “summoning stock” of the Lower Planes. A wizard or priest who summons a lower-planar creature often gets a gehreleth -- unfortunately. Gehreleths are dangerous to summoners because they avenge deeds they are forced to perform, often plotting revenge for many years. They never forget. Gehreleths, may even disobey a summoner, regardless of the importance of the mission. They are stubborn and hate servitude.

Gehreleths speak a guttural language of their own, but can use magic to communicate with others. On the Prime Material Plane, they are sometimes called "demodands".

Note: Gehreleths originally appeared in this form in the Planescape Monstrous Compendium for the AD&D game from TSR. Their use here is for the purposes of providing context for the campaign only.