Shadow Pathway
From Jenny Everywhere Wiki
The Shadow Pathways were a method of supernatural transportation across universes devised by Acantha. She and her followers could step into their own shadows and reemerge out of shadows elsewhere in the Multiverse. Although Acantha technically only invented the Pathways in the timeline where she became truly real, the Cult continued to be able to use the Pathways even after Acantha was reduced to an echo, and, later, after she merged with Briar. (PROSE: Century Smith and the Time Terror)
Behind the scenes
The Shadow Pathways are somewhat reminiscent of the Corridors of Darkness used by antagonists to travel across dimensions in the Kingdom Hearts series.
