"I sought secrets of spellcasting in my pilfered holocron, but its guardian was jealous. Casting my net wider, I recovered scrolls submerged in the blood slurry of the Mongrel Altar. They were concealed behind a mural of King Adas at the Eternal Pyre, interred alongside the headless body of Wyrmuk the Undying."
―Sorzus Syn[src]

Wyrmuk the Undying was an individual whose headless body was interred inside the Mongrel Altar on the planet Korriban. In about 6900 BBY, the Dark Jedi exile Sorzus Syn discovered Wyrmuk's corpse while searching for the secrets of Sith spellcasting.