b'Thin Stranger \n'b'  Medium   fiend  ( demon ),  chaotic evil  \n'b'  Armor Class  15 (natural armor)  Hit points  110 (13d8 + 52)  Speed  30 ft.\n'b' STATS STR: 18 (+4) DEX:  14 (+2)  CON:  18 (+4)  INT:  19 (+4)  WIS:  15 (+2)  CHA:  16 (+3)  \n'b'\n'b'\n'b'\n'b'\n'b'\n'b'\n'b'  Damage Vulnerabilities  cold, thunder  Damage Resistances  lightning; bludgeoning, piercing, and slashing from nonmagical attacks  Damage Immunities  fire, necrotic, poison  Condition Immunities   poisoned   Skills   Arcana  +7,  History  +7,  Intimidation  +7,  Perception  +5,  Stealth  +5  Senses   darkvision  60 ft., passive  Perception  15  Languages  Common  Challenge  8 (3,900 XP) \n'b' Special Traits \n'b'\n'b'  Innate Spellcasting (Psionics) . The thin stranger\xe2\x80\x99s innate spellcasting ability is  Intelligence  (spell save DC 15). It can innately cast the following spells, requiring no components: \n'b'\n'b'  At will :  alter self ,  detect thoughts  \n'b'  1/day each :  dominate monster ,  plane shift  (requires four sentinel spheres present) Loathsome Limbs Whenever the thin stranger takes at least 15 slashing damage at one time, roll a d20 to determine what else happens to it: \n'b'\n'b' d% \n'b' Result \n'b'\n'b' 1-10 \n'b' Nothing else happens. \n'b'\n'b' 11-14 \n'b' One leg is severed from the thin stranger if it has any legs left. A severed leg is unable to  attack  and has a speed of 5 feet. The thin stranger\xe2\x80\x99s speed is halved if it\xe2\x80\x99s missing a leg. If it loses both legs, it falls  prone . \n'b'\n'b' 15-18 \n'b' One arm is severed from the thin stranger if it has any arms left. A severed arm has a speed of 5 feet and can make one unarmed strike  attack  on its turn, with disadvantage on the  attack  roll unless the thin stranger can see the arm and its target. Each time the thin stranger loses an arm, it loses an unarmed strike  attack . If it has both arms, it can crawl. With only one arm, it can still crawl, but its speed is halved. With no arms or legs, its speed is 0, and it can\xe2\x80\x99t benefit from bonuses to speed. \n'b'\n'b' 19-20 \n'b' The thin stranger is decapitated, but the thin stranger dies only if it can\xe2\x80\x99t  regenerate . If it dies, so does the severed head. If its head is severed, the thin stranger loses its bite  attack  and its body is  blinded  unless the head can see it. The severed head has a speed of 0 feet and the thin stranger\xe2\x80\x99s Keen Smell trait. It can make a bite  attack  but only against a target in its space. If the thin stranger finishes a short or long rest without reattaching a severed limb or head, the part regrows. At that point, the severed part dies. Until then, a severed part acts on the thin stranger\xe2\x80\x99s  initiative  and has its own action and movement. A severed part has AC 13, 10  hit points , and the thin stranger\xe2\x80\x99s Regeneration trait. \n'b'\n'b'  Magic Resistance . The thin stranger has advantage on saving throws against spells and other magical effects. Regeneration. The thin stranger regains 10  hit points  at the start of its turn. If the thin stranger takes cold or thunder damage, this trait doesn\xe2\x80\x99t function at the start of the thin stranger\xe2\x80\x99s next turn. The thin stranger dies only if it starts its turn with  0 hit points  and doesn\xe2\x80\x99t  regenerate  \n'b'\n'b' Actions \n'b'\n'b'  Multiattack . The thin stranger makes two unarmed attacks. \n'b'  Unarmed Strike .  Melee Weapon Attack : +7 to hit, reach 5 ft., one creature.  Hit : 8 (1d8 + 4) bludgeoning damage. Instead of dealing damage, the thin stranger can grapple the target (escape DC 15). \n'b'  Extract Brain .  Melee Weapon Attack : +7 to hit, reach 5 ft., one  incapacitated  humanoid  grappled  by the thin stranger.  Hit : The target takes 55 (10d10) piercing damage. If this damage reduces the target to  0 hit points , the thin stranger kills the target by extracting its brain. A humanoid slain by this  attack  rises 24 hours later as a  zombie  or sentinel sphere under the thin stranger\xe2\x80\x99s control, unless the humanoid is restored to life or its body is destroyed. The thin stranger can have no more than 26 zombies or sentinel spheres in total under its control at one time. \n'b'\n'b' About \n'b' A gaunt, nearly skeletal man dressed in black with wide, staring eyes seems to move towards you in slow motion. \n'b' Thin strangers are fiends from beyond, looking for brains to fuel their sentinel spheres.'