Proof that you are never what you eat, this dour mimic always wanted to fly from the first time it saw a bird at wing. However, no matter how many it ate, it never learned the trait. Then it moved on to bigger prey that could fly and when neither griffon nor chimera worked, the mimic fell to despair. It ate, and ate, becoming buildings to lure prey in. Then one day, a hurricane swept through the region and it saw a structure take flight seemingly propelled by its four wide sails. From there on, it achieved its dreams as a dilapidated windmill. Drifting from bleak forest to forest it feeds on the unwary wherever it touches down. Oddly, those it once devoured now treat it as one of their own.

Sailed Mimic

Gargantuan Monstrosity (shapechanger), neutral

Armor Class 13 (natural armor)

Hit Points 112 (9d20 + 18)

Speed 15 ft

Fly 40 ft

Str 23 Dex 12 Con 15 Int 10 Wis 16 Cha 8

SkillsStealth +7

Damage Immunities acid

Condition Immunities prone

Sensesdarkvision 60 ft, passive Perception 13

Languages -

Challenge 6 (2,300 XP)

Shapechanger.

The mimic can use its action to polymorph into a windmill 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 Gargantuan or smaller creature adhered to the mimic is also grappled by it (escape DC 17). 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 windmill.

Flock Together (Object Form Only).

All beast swarms that begin their turn within 30ft of the mimic must succeed on a DC 14 Wisdom save or be charmed by the mimic for the next 24 hours and treat it as an ally. This ability negates a swarms immunity to the charmed condition.

Grappler.

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

Sky Sailing (Object Form Only).

The mimic only has its fly speed while in object form, but loses False Appearance whenever it moves.

Actions

Multiattack.

The mimic makes two pseudopod attacks.

Pseuedpod.

Melee Weapon Attack: +9 to hit, reach 15 ft., one target. Hit: 15 (2d8 + 6) bludgeoning damage. If the mimic is in object form, the target is subjected to its Adhesive trait.

Bite.

Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 15 (2d8 + 6) piercing damage plus 9 (2d8) acid damage.

Bonus Actions

Tosser.

The mimic chooses one creature that it is grappling. That creature gains a 30 ft fly speed until the end of its next turn. The creature must succeed on a DC 17 Strength save or the mimic controls its movement until the end of its next turn.