Jedi survivors (Ossus)

A group of Jedi survivors were the ancestors of the tribal Ysanna in the years following the destruction of the planet Ossus during the Cron Supernova in 3996 BBY.

Unable to get off-world in time before the supernova irradiated the planet, a few powerful Jedi families took refuge in the vast subterranean Crystal Caves beneath the Eocho Mountains. In the rush to collect as many Adegan crystals, the Jedi became trapped in the crystal caves by a collapse in part of the tunnel. The safety of the caves saved the group from the extinction-level event.

Abandoned for dead by the Galactic Republic, the survivors banded together and attempted to create their own society from the ashes to survive the vast wasteland Ossus had become. Over the centuries and the course of generations, the Jedi's descendants lost the proper understanding of The Force and forgot their Jedi heritage. They were the progenitors of the Ysanna people that would come to roam the wastes of Ossus and protect its ruins.

Text and facts from the “Jedi survivors (Ossus)/Legends” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.