The Oblivion
From Jenny Everywhere Wiki
The Oblivion, also known as the Eternal Oblivion, was a place or state of existence to which one could “fall” after being erased from Time. Acantha managed to avoid falling into the Oblivion completely by making alterations to the timelines on her way “down”, setting the stage for her return. As a result, her essence became suspended in a state of half-existence on the fringes of the Oblivion until her Cult arranged for her restoration. (PROSE: Century Smith and the Time Terror)
Behind the scenes
The Oblivion appeared more prominently in the earlier The Crew of the Copper-Colored Cupids story Stranded at Memory's End.