The slumber mimic is a fundamentally lazy creature. Much like a content feline, it would rather snooze away its days, only rousing to obtain a snack and then soon return to whatever dreams the monstrosity dreams. As such, it always and can only take the shape of a bed. Sometimes this is a simple cot, other times four-post opulence. The result is the same, however, some poor creature comes along, rests its head, and never wakes up. So enamored is the slumber mimic of sleeping, and eating sleeping meals, it even developed the ability to force prey into that state. It can, and does, even consume some of its own essence to bewitched particularly resistant targets.

Slumber Mimic

Large monstrosity (shapechanger), neutral

Armor Class 10 (natural armor)

Hit Points 76 (9d10 + 27)

Speed 15ft

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

Skills Stealth +3

Damage Immunities acid

Condition Immunities prone

Senses darkvision 60 ft., passive Perception 10

Languages -

Challenge 4 (1,100 XP)

Shapechanger.

The slumber mimic can use its action to polymorph into a comfy bed 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 a comfy bed.

Grappler.

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

Innate Spellcasting.

The slumber can innately cast Sleep, requiring no material components. Its innate spellcasting ability is Charisma.

Restless Hunger.

As a bonus action, the slumber mimic may sacrifice hit points to increase the potency of its Sleep Spell. For each d8 of damage it takes, the next Sleep spell it casts before the end of its next turn has an additional d8 rolled to determine the hit point threshold for creatures affected.

The Slumber Mimic is immune to any effect that would cause it to sleep.

Actions

Multiattack.

The slumber mimic makes two attacks.

Pseudopod.

Melee Weapon Attack: +6 to hit, reach 10 ft., one target. Hit: 8 (1d8 + 4) 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: 11 (2d6 + 4) piercing damage plus 4 (1d8) acid damage.