Uacmitumavulh

Uacmitumavulh a being of unstoppable power, created by the followers of the death god Hunhau to act as his avatar when the current cycle of creation comes to a close, and destroy the world. Many misinformed westerners held a silly superstition that the end was to occur on December 21st, 2012. The truth of when the cleansing will occur no man knows.

Thaumeil, The twins of Shadow

In the Kaballah, Thaumeil is the name of one of the Qliphoth (or an impure spiritual force.) They are represented as two giant heads with bat-wings.

Carrion Slug

Carrion Slug are among the small group of rare mollusks to inhabit Hell. As the infernal planes are nearly devoid of water, the slugs have taken to using other liquids to obtain moisture. The creatures will slowly swarm on a sleeping demon or soul and rapidly drain it of all blood, leaving a withered husk in the morning. They are generally regarded as pests and are exterminated on sight, although several demon species enjoy feasting upon them, usually raw.

Infernal Locusts

A species of large, carnivorous insect which infest the multiple battlefields in Hell. After major battles they often swarm to feed upon the carnage, afterwhich they usually must be culled to keep them under control. Most demons actually consider the hellish insects to be a rare delicacy.

In the book of Revelations the swarm is released upon mankind under the command of Abbadon, lord of the pit.

The Order of D'hjuin

The Order of D'hjuin is a secretive sect of adepts who serve a being called "D'hjuin," who they maintain is a dark extradimentional being currently locked in the center of a neutron star. They are primarily made of up a humanoid race from Zeta Reticuli, but will accept members from other races if they are deemed worthy. Each member goes through decades of instruction and indoctrination, finally accumulating in a ritual where each member seals their mouths shut in an eternal vow of silence. The order works to free D'hjuin from his prison, whereupon they believe he will reshape the universe in his image.