I have not seen anywhere, anyone who has posted where this thing drops.

Is it even in the game?

It's all I need to try research on Moonfire but it doesn't seem to exist.

Just saw someone claimed Rune of Coruscating drop from Judicators and perhaps others in the Royals area in Chardok.

Can anyone confirm this?

I got one somewhere and sold it for 3k off my bazaar bot.

No idea where I got it either.