Ungoliant (Earth-130115)

Ungoliant is the nickname given by Spider-Man to the demonic Spider-Totem that inhabited Earth-130115. Its true name is unknown, but it (she?) was almost certainly not the Ungoliant featured in The Silmarillion.

Origins
Almost nothing is known of Ungoliant's life prior to the events of Spider-Verse Domestics. The land in which she resides in her home universe is littered with the remains of enormous creatures, ranging from spiderlike exoskeletons like her own to endoskeletons resembling those of whales. Bite patterns on some of these remains suggests that most of them were killed by Ungoliant when she was much smaller--and, resumably, much younger. Evidence seems to imply that she is at least two thousand years old.

Spider-Verse Domestics
The events of Spider-Verse put enormous strain on the Web of Life. The Spider-Army's frequent travel between dimensions temporarily weakened its integrity, a situation not helped by the captivity and enslavement of the Great Weaver. As a result, realities containing Spider-Totems became, for a time, far more susceptible to outside interference; in particular, the boundaries between realities on the "outskirts" of the Web of Life began thinning--a fact Ungoliant sought to capitalize on to expand her territory.

OsCorp researchers of Earth-61610, too, attempted to capitalize on the increased resonance with alternate realities by opening their widest portal ever between their own and a nearby one. Said portal was meant to be a mere 30 nanometers in diameter, but Ungoliant hijacked the portal, forcibly widened it to an impossible 97 meters, and began sending her spawn through. Widening the portal to such an extent destabilized it, opening smaller portals to neighboring iterations containing less powerful Spider-Totems, and gradually pulling them through.

It wasn't long before the unstable portal in the bowels of OsCorp Tower, and the spiderlike creatures that emerged and attacked every human in sight, attracted the attention of Earth-61610's Spider-Man. Recognizing the Spider-Totem, Ungoliant directed her children to attack him, but he managed to fight them off and successfully closed the portal, severing her front legs in the process. Wounded, Ungoliant was forced to retreat until she could regain her strength and form a plan of attack, unaware that her actions had deposited several other Spider-Men into Earth-61610.