D&D General Where did I get the demiplane Charontlis from?

[Sword of Spirit]

Going through my campaign manager software, I find that I made the Iron Obelisk on the Isle of Dread (I have the Goodman Games remake) include a portal to a demiplane called Charontlis.

Apparently Charontlis was created by a vanished race of powerful psionics, and includes the descendants of their myconid servants.

That doesn't sound to me like something I made up, but I'm having a hard time finding the source for it, and web searches aren't turning up anything either.

Does anyone here know the source material for this demiplane?

 

[Misanthrope Prime]

This thread is literally the only hit for that word on Google are you misreading or misspelling it? Presumably it has something to do with the god or moon Charon?

 

[Tonguez]

Genshin Impact has a Papilio Charontis quest where the player explores the border between the realm of the living and the afterlife. Have you played that game?

 

[Parmandur]

Going through my campaign manager software, I find that I made the Iron Obelisk on the Isle of Dread (I have the Goodman Games remake) include a portal to a demiplane called Charontlis.

Apparently Charontlis was created by a vanished race of powerful psionics, and includes the descendants of their myconid servants.

That doesn't sound to me like something I made up, but I'm having a hard time finding the source for it, and web searches aren't turning up anything either.

Does anyone here know the source material for this demiplane?

Thst sounds vaguely like some of the expanded material from the Goodman 5E rendition? Been a while since I read that, though.