My party jokes about the Palabard’s helmet being a mimic. He went College of Eloquence, and the DM allowed him to swap the Persuasion/Deception bonus for Persuasion/Intimidation instead. He also took expertise in intimidation, so with RAW he can’t roll lower than a 21. And sue to a mimic’s CHA of 8, it has a -1 on any intimidation saves, so it can literally never out-roll the Palabard.

We joke that the mimic started as a helmet to try and entice a creature into wearing it… But now (because of his min-maxed intimidation bonus) it’s afraid to actually reveal itself and attack the Palabard. On top of that, it has realized that if it just sticks with the party that it’ll eat plenty from the corpses they leave behind.