A couple years later, with GPT-6. https://underdark-duel.netlify.app
Apparently the mindflayer has a "101-bone skeletal rig"
(This is 5E 2014 rules, and I didn't see major errors, though the mind flayer might have had more creative tactics. Also sorry for the repeated errors in posting)
I propose the Encounter Test as a nerdy benchmark standard for AI. Ask an AI to simulate an encounter between two D&D creatures & see how long it takes to mess ...