Dear God, just look at it.
Mimics are the worst, tricking oblivious adventurers into becoming a snack. This Skyrim mod appears to be based on the most grotesque of the lot of them: Dark Souls' mimics. There's not one part of them that isn't incredibly unsettling, but it's that horrible, diseased tongue that turns my stomach.
Skyrim modder Mihail created them for the original version of Skyrim, but they've recently been added to Skyrim Special Edition, letting you ruin your dungeon dives once again. You can download it here.