Nothic

A baleful eye peers out from the darkness, its gleam hinting at a weird intelligence and unnerving malevolence. Most times, a nothic is content to watch, weighing and assessing the creatures it encounters. When driven to violence, it uses its horrific gaze to rot the flesh from its enemies' bones.
Cursed Arcanists. Rather than gaining the godlike supremacy they crave, some wizards who devote their lives to unearthing arcane secrets are reduced to creeping, tormented monsters by a dark curse left behind by Vecna, a powerful lich who, in some worlds, has transcended his undead existence to become a god of secrets. Nothics retain no awareness of their former selves, skulking amid the shadows and haunting places rich in magical knowledge, drawn by memories and impulses they can't quite understand.
Dark Oracles Nothics possess a strange magical insight that allows them to extract knowledge from other creatures. This grants them unique understanding of secret and forbidden lore, which they share for a price. A nothic covets magic items, greedily accepting such gifts from creatures that seek out its knowledge.
Lurkers in Magical Places Nothics are notorious for infiltrating arcane academies and other places rich in magical learning. They a re driven by the vague knowledge that there exists a method to reverse their condition. This isn't a clear sense of purpose, but rather an obsessive tug at the end of the mind. Some nothics are clever enough to realize that this is merely part of the strange lesson for their folly, a false hope to drive them to seek out more arcane secrets.

Nothic

A baleful eye peers out from the darkness, its gleam hinting at a weird intelligence and unnerving malevolence. Most times, a nothic is content to watch, weighing and assessing the creatures it encounters. When driven to violence, it uses its horrific gaze to rot the flesh from its enemies' bones.

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Armor Class	15 (natural armor)
Hit Points	6d8+18
Speed	30ft.
Strength	14 (+2)
Dexterity	16 (+3)
Constitution	16 (+3)
Intelligence	13 (+1)
Wisdom	10 (+0)
Charisma	8 (-1)
Skills	Arcana d20+3	Insight d20+4	Perception d20+2
Stealth d20+5
Senses	Truesight 120ft.	Passive Perception 12
Languages	Undercommon
Challenge	2 (450 XP)
Special	Keen Sight	The nothic has advantage on Wisdom	(Perception) checks that rely on sight
Action 1	Multiattack	The nothic makes two claw attacks
Action 2	Claw	Melee Weapon Attack	d20+4 to hit
Reach 5 ft., one target	Hit 1d6+3 slashing damage
Action 3	Rotting Gaze	The nothic targets one creature it can see within 30 feet of it.	The target must succeed on a DC 12 Constitution saving throw
against this magic or take 3d6 necrotic damage
Action 4	Weird Insight	The nothic targets one creature it can see within 30 feet of it.	The target must contest its Charisma (Deception)
check against the nothic's Wisdom (Insight) check.	If the nothic wins, it magically learns one fact	or secret about the target.	The target automatically wins if
it is immune to being charmed