Thaumaturge
Wandering. Not lost. (He/they)
Very cool, and I've never even thought about vampire beholders... that might be fun!
I was also wondering about Mind Flayers: are there several entries and what CR range are they? I'm in the middle of trying to get a pseudo-Underdark adventure thought out and trying to get a feel for the CR of all the nasties I want to include.
Mind flayers are CR 7. Mind flayer arcanists are considered deviants by other illithid, are 10th level spellcasters, and CR 8.
Thaumaturge.