Alioth

The Kang that Loki and Sylvie hunt down harnessed the power of a monster called Alioth—the big, scary purple cloud from the penultimate episode that eats beings and worlds.

He used Alioth to subdue the other timelines and created the TVA to maintain the one true timeline.

Alioth is very nearly opposite Shedir in Cassiopeia, and at an equal distance from the Pole.