They are the big bad behind a lot of terrible things, and while there’s only one stat block (one and a half, really) it’s a solid CR 7 enemy with some handy tricks – magic resistance, mind blast and, of course, brain eating. In 5th Edition, they’re positioned as the scions of a once-great empire that spanned the cosmos, aeons before the gods of the “present day” in D&D. We take stab at it from to different angles. 5e Monster Manual gives the rules in a concise block for Mind Flayers as Characters.