b'The Insatiable One \n'b'  Family:   Devils  \n'b'  Large   swarm  of Tiny elementals,  lawful evil  \n'b'  Armor Class  17 (natural armor)  Hit Points  170 (20d10 + 60)  Speed  5 ft., fly 40 ft. (hover)\n'b' STATS STR: 3 (-4) DEX:  21 (+5)  CON:  16 (+3)  INT:  20 (+5)  WIS:  18 (+4)  CHA:  23 (+6)  \n'b'\n'b'\n'b'\n'b'\n'b'\n'b'     Saving Throws   Dex  +10,  Con  +8,  Wis  +9,  Cha  +11  Skills   Arcana  +10,  Deception  +11,  Insight  +9,  Perception  +9,  Persuasion  +11  Damage Vulnerabilities  cold  Damage Immunities  fire, poison; bludgeoning, piercing, slashing  Condition Immunities   charmed ,  frightened ,  paralyzed ,  petrified ,  prone ,  poisoned ,  restrained ,  stunned   Senses   blindsight  10 ft., darkvision 120 ft., passive Perception 19  Languages  Common, Draconic, Infernal, Primordial  Challenge  15 (13,000 XP) \n'b' Special Traits \n'b'   Elemental Swarm . The Insatiable One can occupy another creature\xe2\x80\x99s space and vice versa, and the swarm can move through any opening large enough for a Tiny insect. \n'b'  Magic Resistance . The Insatiable One has advantage on saving throws against spells and other magical effects. \n'b'  Innate Spellcasting . The Insatiable One\xe2\x80\x99s spellcasting ability is  Charisma  (spell save DC 19, +11 to hit with spell attacks). The Insatiable One can innately cast the following spells, requiring no material components: \n'b'   At will : fire bolt, poison spray \n'b'  3/day each :  burning hands ,  invisibility ,  ray of enfeeblement , ray of sickness \n'b'  1/day each :  bestow curse ,  contagion ,  harm ,  insect plague ,  fireball  \n'b'   Inhabit . The Insatiable One can enter the body of an incapacitated or dead creature by crawling into its mouth and other orifices. Inhabiting requires 1 minute, and the victim must be Small, Medium, or Large. The Insatiable One can abandon the body as an action. Attacks against the host deal half damage to the Insatiable One as well, but the Insatiable One\xe2\x80\x99s resistances and immunities still apply against this damage. If the Insatiable One inhabits a dead body, it can animate it and control its movements, effectively becoming a zombie for as long as it remains inside. In a living victim, the Insatiable One can control the victim\xe2\x80\x99s movement and  actions  as if using  dominate monster  (save DC 19) on the victim. The Insatiable One can consume a living victim; the target takes 5 (2d4) necrotic damage per hour while the Insatiable One inhabits its body, and the Insatiable One regains  hit points  equal to the damage dealt. When inhabiting a body, the Insatiable One can choose to have any spell it casts with a range of self, target the inhabited body rather than itself. The skin of a creature inhabited by the Insatiable One crawls with the forms of the insects inside. The Insatiable One can hide this telltale sign with a  Charisma  ( Deception ) check against a viewer\xe2\x80\x99s passive  Insight . A  greater restoration  spell or comparable magic forces the Insatiable One to abandon the host. \n'b'  Smoke Shroud . The Insatiable One is shrouded in a 5-foot-radius cloud of dark smoke. This area is lightly  obscured  to creatures other than the Insatiable One. Any creature that needs to breathe that begins its turn in the area must make a successful DC 16  Constitution  saving throw or be  stunned  until the end of its turn. \n'b'  Actions \n'b'   Bites .  Melee Weapon Attack : +10 to hit, reach 0 ft., one creature in the swarm\xe2\x80\x99s space.  Hit : 21 (6d6) piercing damage plus 14 (4d6) fire damage plus 14 (4d6) poison damage, or 10 (3d6) piercing damage plus 7 (2d6) fire damage plus 7 (2d6) poison damage if the Insatiable One has half of its  hit points  or fewer. The target must succeed on a DC 16  Constitution  saving throw or be  poisoned  for 1 minute. A  poisoned  creature repeats the saving throw at the end of each of its turns, ending the effect on itself on a success. \n'b'  Smoke Jump . The Insatiable One can travel instantly to a space in sight where there\xe2\x80\x99s smoke. \n'b'  Whirlwind (Recharge 4-6) . Each creature in the Insatiable One\xe2\x80\x99s space must make a DC 18  Strength  saving throw. Each creature that fails takes 28 (8d6) bludgeoning damage plus 14 (4d6) fire damage plus 14 (4d6) poison damage and is flung up 20 feet away from the Insatiable One in a random direction and knocked  prone . If the saving throw is successful, the target takes half the bludgeoning damage and isn\xe2\x80\x99t flung away or knocked  prone . If a thrown target strikes an object, such as a wall or floor, the target takes 3 (1d6) bludgeoning damage for every 10 feet it traveled. If the target collides with another creature, that creature must succeed on a DC 18  Dexterity  saving throw or take the same damage and be knocked  prone .'