Slith
Prince Slith is the son of Ugrach, King of the Underworld. He was first encountered by Khalas at the beginnings of the War of Humanity when the Triumvirate was preparing its forces. Slith was eager to join the army of the Triumvirate and was practically forced to do so after being cast out of the Underworld by his father, who wanted nothing to do with the war. The most notable achievement of Slith's undead forces in that war was the complete decimation of Thoth's Quisalis assassins, though later he was banished along with the demon Pazuzu to the Chaos Plane.
In the year 309 AF, an unknown entity was found to have kidnapped the unborn son of Aegis and Eris, and when it returned to steal the boy's twin sister, was revealed to be Slith himself. With the God of War in pursuit, Slith disappeared from the Prime Material Plane.
He was not seen again until 326 AF, when the Darkenwood was suffering from a mysterious ailment, and Slith was spotted lurking around the Living Spire. Slith was soon revealed to be hiding within the Darkenwood itself, draining its essence at the behest of Sartan. It was revealed that, after kidnapping the child Pandemonium, Slith was split into two beings by the God of Evil, one half retreating to a hidden plane with Aegis in pursuit, the other half to the Darkenwood.
Around the year 333 AF, Slith snuck into Shallam and was able to steal a small piece of essence from the ailing Pentharian, enabling him to trap the God on a hidden plane. He later found he posessed a portion of essence belonging to both Lorielan and Mithraea as well, and set traps for the Goddesses as well. He was able to successfully trap Mithraea on the plane with Pentharian, but was defeated in his attempt to secure control of Lorielan.
Slith's current whereabouts are unknown.