Even monstrosities can have their hearts moved by music, and such is the case with the fiddler mimic. This particular shapechanger strived to create the best facsimile of its favorite instrument, in this case a variety of violins. It was moved by this particular string instrument because it could produce a wide variety of feelings from ecstatic to maudlin and all in between. It also came to loathe terrible performers except for the lovely bitterness of their flesh. As a fiddle, it could easily hunt its preferred prey, but even a middling musician will do in a pinch.

Fiddler Mimic

Tiny monstrosity (shapechanger), neutral

Armor Class 14 (natural armor)

Hit Points 82 (15d4 + 45)

Speed 15ft

Str 18 Dex 9 Con 7 Int 5 Wis 13 Cha 14

Skills Performance +6, Stealth +9

Damage Immunities acid, thunder

Condition Immunities prone

Senses darkvision 60 ft., passive Perception 10

Languages -

Challenge 5 (1,800 XP)

Shapechanger.

The mimic can use its action to polymorph into a fiddle/violin or back into its true, amorphous form. Its statistics are the same in each form. Any equipment it is wearing or carrying isn't transformed. It reverts to its true form if it dies.

Adhesive (Object Form Only).

The mimic adheres to anything that touches it. A Huge or smaller creature adhered to the mimic is also grappled by it (escape DC 14). Ability checks made to escape this grapple have disadvantage.

False Appearance.

While the mimic remains motionless, it is indistinguishable from an ordinary fiddle/violin.

Grappler.

The mimic has advantage on attack rolls against any creature grappled by it.

The Show Must Go On.

The fiddler mimic has advantage against all effects that might silence it. 1/day it may cast Dispel Magic (spell stat is Charisma) against a magical Silence effect.

Actions

Multiattack.

The fiddler mimic makes two Cutting Chord attacks.

Pseudopod.

Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 2 (1d4 + 2) bludgeoning damage. If the mimic is in object form, the target is subjected to its Adhesive trait.

Bite.

Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 2 (1d4 + 3) piercing damage plus 9 (2d8) acid damage.

Cutting Chord.

Ranged Spell Attack: +7 to hit, range 60/120 ft., one target. Hit: 13 (2d8+4) thunder damage. The fiddler cannot use this action if it is Silenced.

Cut a Rug (Recharge 5-6).

All non-mimic creatures that are not deafened within 30ft of the mimic must succeed on a DC 14 Charisma Save or dance in place until the end of its next turn. Creatures that can't be charmed are immune to this spell.

A dancing creature must use all its movement to dance without leaving its space and has disadvantage on Dexterity saving throws and attack rolls. While the target is affected by this spell, other creatures have advantage on attack rolls against it.

Variant: Ominous Ambiance (Recharge 5-6).

All non-mimic creatures that are not deafened within 30ft of the mimic must succeed on a DC 14 Charisma Save or be frightened of the mimic until the end of its next turn and must use their reaction to move away from the creature. Creatures that fail the save by 5 or more are Paralyzed until the end of their next turn instead.