The Great Gate of Change, also called Jinao's Gate, through which the Le'enle traveled to reach their current universe. So called not primarily because of the change in location, but because the Gate also changed the Le'enle from primarily bodied-creatures to primarily energy-form creatures, shapeshifters made primarily of magic.
From the short story "Not Now, Not Ever" :
Directly behind him was the Gate. It was not shaped like one, despite the Le'enle penchant for such absurdities. No, this was a blinding white hole, a puncture that snarled the multiple tapestries of the surrounding spaces and then tore them, sucking the strands down into nowhere. The center of the Gate, if center it had, fountained light and energy like a geyser. The heat off it warmed Silent Chain's cheeks and nose.