The town mayor enjoyed a quick rise to power and fortune, for the small area he lived in, over the last year. However, he's grown sick as well, exhausted and restless. To cure his woes, he's paid your party to head to a lonely old hill where a well sat. The mayor said this is where his fortunes turned around for the better and there may be some clue as to his illness there too. The well seemed normal enough on approach, worn by the ages. Then undead shadows slithered up from the ground, but you managed to vanquish them. Now, you could investigate the well properly. Leaning over the edge to peer down into it, you noticed your hands stuck to the stone. Then the rope and bucket wrapped around your head, slimy and pink. The well mouth is now closing like a mouth. Roll for initiative.

A strange creature indeed, the first well mimic was crafted by a bored djinn's hands. He invested a sliver of his power into the monstrosity and sculpted it to take the form of a well alone. After all, that's where silly mortals went to wish for the most mundane of things. He intended to return now and again to discover what chaos had ensued but soon found himself struck by a strange illness. Little by little, his power and life flittered away. By the time he realized that the mimic spawned polyps and each one of those took another slice of his power to become their own wishing wells, it was too late. While the djinn evaporated into nothingness, this also meant that no further well mimics could be born. Unless one dies then there is just enough power to birth another.

Well Mimic

Medium Mimic (shapechanger), neutral

Armor Class 11 (natural armor)

67 (9d8 + 27)

Speed 15 ft

Burrow 15 ft

Str 18 Dex 10 Con 16 Int 5 Wis 16 Cha 8

Skills Stealth +4

Damage Immunities acid

Condition Immunities prone

Sensesdarkvision 60 ft, passive Perception 13

Languages -

Challenge 3 (700 XP)

Shapechanger.

The mimic can use its action to polymorph into a well 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 (Object Form Only).

While the mimic remains motionless, it is indistinguishable from an ordinary well.

Grappler.

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

Innate Spellcasting.

The mimic can innately cast Minor Illusion (spell save DC 13), requiring no material components. Its innate spellcasting ability is Wisdom. Using this ability does not break the mimic's False Appearance.

Tunneler.

The mimic can burrow through solid rock at half its burrow speed and leaves a 5-foot-diameter tunnel in its wake up to 30ft.

Wishful Wasting (Object Form Only) 1/year.

If a creature tosses a coin into the mimic to make a wish and the mimic can use Wishful Wasting, it may choose to do so. That creature's wish is fulfilled as if it had cast the Wish spell. However, that creature is also cursed with Wishful Wasting. At the end of each month, the creature loses the ability to use one of its remaining Hit Dice to recover hit points. If the creature has no Hit Dice to lose, it immediately dies. Whenever the creature dies it rises as a shadow at the next sunset in the mimic's location and under the mimic's control. Wishful Wasting can only be removed via Remove Curse spell or similar ability, at which time everything gained from the original Wish is also removed. Wishful Wasting can and will take president over any stipulations of a Wish spell that effects a creature affected by it.

Actions

Multiattack.

The mimic makes two pseudopod attacks.

Pseudopod.

Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 7 (1d8 + 3) bludgeoning damage. If the mimic is in object form, the target is subjected to its Adhesive trait.

Bite.

Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) piercing damage plus 4 (1d8) acid damage.

Create Water (Object Form Only) 3/day.

The mimic can create water as if it had cast Create/Destroy Water