I think it was actually the Kathol Rift, not the Kathol Drift - but apart from that, it sounds right to me.Shawn Carman said:I'm struggling to remember this, as it's been a long time, but in essence the Charon were originally created as one of many servitor races of some ancient, brilliant creator race on a planet out beyond the known galaxy. There was some great cataclysm that resulted in the creation of the Kathol Drift, a nebulae-like phenomenon that blocked most attempts to reach the world by space travel.
There's also a little more info on them in the Rebellion Era SourcebookKanegrundar said:Yeah. The Charon appeared in the Utlimate Alien Anthology, stated in my original post above.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.