Talk:Assassination/@comment-36607352-20181023150517/@comment-81.53.48.249-20200221030044

The opponents immune to backstabs are all kinds of beholders, slimes/jellies/oozes, many demons and devils, celestial beings, Amelyssan, the Five, Demogorgon, Azamantes and a lot of people protecting Demogorgon's seal, Bone fiends, Demiliches except Kangaxx (the weakest of them), Vongoethe, Yaga Shura's lieutenants, many dragons, many golems, the two minotaurs in the 4th level of the Watcher's Keep, and that's about it.

So you should be pretty safe with mages, clerics and most humanoids or undeads.