I am currently a lv13 Necromancer and my 14th lv ability lets me control 1 undead. I want to know what the strongest official undead creature is with an int of 11 or less so I can start tracking 1 down now. I've seen this question asked before but I haven't found an answer that doesn't include using the spell feeblemind which is something I don't have access to. Just to clarify by strongest I mean I'm just looking for the highest CR
1 Answer
That would be the Nightwalker, from Mordenkainen's Tome of Foes. CR20, with an Intelligence score of 6, and no legendary resistances.
The only undead with higher CR are the Lich, Illithilich, Jarad vod Savo, and Lady Illmarrow, all of which have 20+ intelligence.