|The Thieves' Quarrel|
|Conflict: Battles of Beleriand|
|Date: YT ?|
|Outcome: Ungoliant betrays Morgoth, and attempts to attack him. Victory for Morgoth; Ungoliant flees into the Ered Gorgoroth|
|Morgoth, Balrogs from Angband and Utumno||Ungoliant|
|Morgoth and the host of Balrogs||Ungoliant|
|None; Morgoth was webbed by Ungoliant, but is freed by the Balrogs||None; Ungoliant flees and sets up her abode in Nan Dungortheb|
After the dispute over the Silmarils, Morgoth and Ungoliant fled Valinor and made it to lands above the Firth of Drengist. At this place, Ungoliant demanded payment for helping Morgoth overthrow the Two Trees of Valinor and take the Silmarils. Grudgingly, Morgoth gave her all the jewels from one hand. But he refused to hand over the Silmarils, even though they burned him.
But Ungoliant, having grown to a powerful and monstrous form after consuming the light of the jewels, wrathfully ensnared and attempted to strangulate her master with her webs of darkness, but Morgoth sent forth a great cry. Balrogs lurking in the vaults of Angband heard him, and rushed to aid him, destroying the webs with their whips of flame.
Ungoliant fled from the region, and made her abode in Nan Dungortheb. There, she mated with the giant Spiders that dwelt in the nearby Ered Gorgoroth, and devoured them. The resulting unions produced a massive brood of half-demonic spider-like children, which infested Nan Dungortheb, as well as the Mountains of Terror, throughout the subsequent years of the First Age.
After an unknown amount of time, Ungoliant abandoned her domain, and wandered into the forgotten South of the world. Although it is believed that she devoured herself amid her uttermost famine, her true fate remains unknown.
The area of his strife with Ungoliant was hereafter known as Lammoth. Whenever someone shouted in that region, the cry of Morgoth was heard as the echo.