Dune Mimic

Huge monstrosity (shapechanger), neutral

Armor Class 13 (natural armor)
Hit Points 168 (16d12 + 64)
Speed 15 ft.

STR	DEX	CON	INT	WIS	CHA
20 (+5)	8 (-1)	18 (+4)	9 (-1)	13 (+1)	10 (+0)

Skills Perception +4
Damage Immunities acid, fire
Condition Immunities prone
Senses darkvision 60 ft., tremorsense 30 ft., passive Perception 14
Languages —
Challenge 8 (3,900 XP)
Proficiency Bonus +3

SPECIAL TRAITS

• Adhesive (Object or Terrain Form Only). The dune mimic adheres to anything that touches it. A creature adhered to the dune mimic is also grappled by it (escape DC 15). Ability checks made to escape this grapple have disadvantage. The dune mimic can harden its outer surface, so only the creatures it chooses are affected by this trait.
• False Appearance (Object or Terrain Form Only). While the dune mimic remains motionless, it is indistinguishable from an ordinary sandy object or terrain feature.
• Grappler. The dune mimic has advantage on attack rolls against any creature grappled by it.

ACTIONS

• Multiattack. The dune mimic makes three Pseudopod attacks. It can replace one attack with a use of Engulf.
• Pseudopod. Melee Weapon Attack: +8 to hit, reach 15 ft., one target. Hit: 18 (3d8 + 5) bludgeoning damage. If the dune mimic is in object or terrain form, the target is subjected to the mimic’s Adhesive trait.
• Engulf. The dune mimic engulfs a Large or smaller creature grappled by it. The engulfed target is blinded, restrained, and unable to breathe, and it must succeed on a DC 15 Constitution saving throw at the start of each of the mimic’s turns or take 10 (3d6) slashing damage, as the creature is lacerated by the mimic’s sand-coated form. If the mimic moves, any engulfed creatures move with it. The mimic can have no more than two creatures engulfed at a time.

BONUS ACTIONS

• Change Shape. The dune mimic transforms into a Huge sand- or gravel-covered object, shapes itself into a sandy or rocky terrain feature no larger than a 20-foot cube or transforms 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.

ABOUT

The sand surges and shifts, a sinkhole opens, and sandy tendrils reach out.

Enormous Forms. Though most commonly seen as dunes, a dune mimic can take the form of a date palm grove, a riverbank, an enormous boulder, or other large shapes in the landscape.

A King’s Guardians. Dune mimics were created by a forgotten king as guardians for his desert tomb. Somewhere, dozens of them guard vast wealth.

Spread by Spores. Although not intended to reproduce, they began producing spores spontaneously and replicating themselves. Now they are spread across the deserts. Luckily for the other inhabitants, dune mimics reproduce just once per century.