Iok-Sothoth

The Iok-Sothoth (イオグ＝ソトース) were the displaced spirits (まつろわぬ霊) that the supreme master of the Final Gods, Quasarmageddon Chaos collected from countless universes it destroyed and devoured.

In the Battle of the Hercules-Corona Borealis Great Wall, Quasarmageddon Chaos appeared as the final enemy of the entire universe, accompanied by trillions of Iok-Sothoth prepared for the fight. After Quasarmageddon was vanquished, all the Iok-Sothoth were erased along with it, never to become a threat again.

Appearance
Iok-Sothoths are formless. However, they can on the form of various Forbidden and Final Gods such as Quasar Estes, Cth, El Millennium and Ygso'Gurath.

Abilities
Iok-Sothoths have power that are akin to the Final Gods. They can manifest in the form of different Final Gods. As such, as shown in the final battle, the millions of multiple copies of Quasar Estes, Ygso'Gurath and others that fought the remaining living forces of the universe were just shells inhabited by the Iok-Sothoth.

Trivia

 * The term "Iok-Sothoth" comes from the name the Outer God Yog-Sothoth.