Mimics from Tasha's Cauldron of Everything [and other mimics, too]! (D&D Compendium of Monsters)

One encounter idea I favor involves an elderly mimic, in its twilight years, old, world weary, and just sick of fighting for every meal, so, in the dead of night, it sneaks into a city and infiltrates the mortuary. It can have it's pick of, admittedly dead, but mostly fresh meat every night, and no fighting back. That, and when bodies start vanishing, most adventurer types will start the hunt for undead, never realizing the real culprit is an extra coffin in the storeroom.

Something I love from Pathfinder was the Failed-Apotheosis Mimic. Its a mimic that dreamed of being human and thus tried to shape shift into one. Its only after they try they realize their true alien nature and are trapped in an amorphous state, their bodies constantly trying and failing to take on humanoid form. The idea that a mimic having ambitions, and even going mad is an interesting concept. Perhaps this is where Gibbering Mouthers come from. One particular evil Mimic I made was from my Jester's Keep adventure. A collection of every mean trap and joke I could think of. I had it take the form of a small golden statue with extremely small lettering the PCs couldn't quite make out in the dungeon. It wasn't very big, but it allowed the adventurer to pick it up and place it in his bag. He never knew he was carrying a mimic the entire time. It changed shape several times while in his bag, but always returned to that small gold statue. When the adventure was over the PCs divided up the loot and went to their rooms. The mage who had bought a magnifying glass to read them, read aloud "FOOLED YOU" and had his nose bitten off.

Wow I never knew there was different types of mimics I just thought there was normal chest mimics

There is a ship among the legendary mimic ( 6:59 ), which is pretty rad. I don't know if I prefer mimic as shapeshifting monstruosity or as Deliscious Dungeon's crustaceans. On paper they look cute, but the big ones in real life terrifies me.

Dark Souls flashbacks in 3…2…1…..

I actually made a mimic race for my players to play as. They are humanoid clothing with some notable differences, but they could shape shift if they held still.

Thing is about dealing with mimics is, it won't always hold. They are not good, benevolent critters. They can be very opportunistic. Imagine giving it food for safe passage and going deeper into the dungeon, but the party gets overwhelmed, and the survivors are on their last HP as they make their way to the exit. The mimic is still there, and hey, if he decides they are weakened and tasty, who's going to call the creature out on his duplicity after they're in it's stomach?

Fun video; thanks for posting

Do you guys think that these things should be aberrations instead of monstrosities? Thier ability to change shape looks pretty alien to me.