Kor-Virliath

Kor-Virliath is an Elder God from the 18th hell dimension. Zargothrax attempted to summon Kor-Virliath to devour the universe. He did this by reciting the dread incantation and placing the Goblin King's crystal key into an altar in the Dwarven caverns beneath the Citadel of Dundee. As he did this, ancient runes began to glow on the surface of the portal and opened a chaosportal to the galactic nexus.

The dark prophecy of Anstruther seems to have predicted Kor-Virliath's summoning.