madness stretched with only about flayers for long

Black Crystal Tablet

Magic Items Waterdeep: Dungeon of the Mad Mage

Any creature that attunes to the tablet must make a DC 20 Wisdom saving throw at the end of its next long rest. On a failed save, the creature becomes afflicted with a random form of long-term

madness (see “Madness” in chapter 8 of the Dungeon Master’s Guide). As an action, a creature attuned to the Black Crystal Tablet can use it to cast eyebite or gate (the portal created by

Dyrrn

Monsters Eberron: Rising from the Last War

each time it fails the saving throw for this lair action. The target dies if its Intelligence score is reduced to 0. The reduction lasts until the target finishes a short or long rest. Regional

passage, that creature must succeed on a DC 22 Wisdom saving throw or descend into a type of madness (see “Madness of Dyrrn” below). A creature that succeeds on this saving throw can

Demogorgon Legacy

Monsters Out of the Abyss

Demogorgon’s cult can inspire madness in those who contemplate it for too long. All the followers of the Prince of Demons go mad, sooner or later.Demogorgon’s Lair Demogorgon makes his lair

until the target finishes a long rest. The target dies if its hit point maximum is reduced to 0. Gaze. Demogorgon turns his magical gaze toward one creature that he can see within 120 feet of him. That

Fraz-Urb'luu Legacy

Monsters Out of the Abyss

that of a great gargoyle, some 12 feet tall, with an extended, muscular neck and a smiling face framed by long, pointed ears and lank, dark hair, and bat-like wings are furled against his powerful

creatures within 1 mile of the lair frequently see hallucinations of long-dead friends and comrades that vanish after only a brief glimpse. Roads and paths within 6 miles of the lair twist and turn back on

Derro

Monsters Mordenkainen Presents: Monsters of the Multiverse

lone derro may seem pitiable, but a cackling, spitting, growling, howling horde of them is horrifying to behold. Fractious in groups and individually weak, derro would have died out long ago but for

some duergar, derro are descended from a dwarven community that was left behind when the others escaped the rule of mind flayers. These remnants were so distorted by the mind flayers’ psionic

Mind Flayer Prophet

Monsters Phandelver and Below: The Shattered Obelisk

Awareness. The mind flayer has advantage on initiative rolls and can’t be surprise;surprised as long as it doesn’t have the incapacitated condition. Magic Resistance. The mind flayer has

monster, plane shift (self only), true seeingSome mind flayers dedicate their lives to channeling abstruse truths from beyond reality. This insight gives them preternatural senses and allows them to

Zuggtmoy Legacy

Monsters Out of the Abyss

infected by these spores for 24 hours. On a failed save, the creature is infected with a disease called the spores of Zuggtmoy and also gains a random form of madness (determined by rolling on the Madness

humanoid spends at least 1 hour within 1 mile of the lair, that creature must succeed on a DC 17 Wisdom saving throw or descend into a madness determined by the Madness of Zuggtmoy table. A creature

Gray Dwarf (Duergar) Legacy

Species Sword Coast Adventurer's Guide

thus made them into the superior race. Duergar have no appreciation for beauty, that ability having been erased from their minds by the mind flayers long ago and any thought of recapturing it

The gray dwarves, or duergar, live deep in the Underdark. After delving deeper than any other dwarves, they were enslaved by mind flayers for eons. Although they eventually won their freedom, these

Alhoon

Monsters Mordenkainen Presents: Monsters of the Multiverse

that path is long and fraught with barriers. Alhoons are mind flayers who have used a shortcut to attain a lichlike state. Elder brains forbid mind flayers from pursuing magic power aside from psionics

alhoon targets one creature it can see within 60 feet of it that is casting a spell. If the spell is 3rd level or lower, the spell fails, but any spell slots or charges are not wasted.Mind flayers that

Cranium Rat

Monsters Mordenkainen Presents: Monsters of the Multiverse

+4", "rollType":"to hit", "rollAction":"Bite"} to hit, reach 5 ft., one target. Hit: 1 piercing damage.Mind flayers create cranium rats by bombarding rat;rats with psionic energy. If enough cranium

their heightened intelligence for as long as the swarm persists. The swarm also awakens latent psionic abilities implanted within each cranium rat by its mind flayer creators, bestowing upon the swarm

Derro Savant

Monsters Mordenkainen Presents: Monsters of the Multiverse

energy in a 5-foot-wide line that is 60 feet long. Each creature in the line must make a DC 12 Dexterity saving throw, taking 21 (6d6);{"diceNotation":"6d6", "rollType":"damage", "rollAction

powerful. A lone derro may seem pitiable, but a cackling, spitting, growling, howling horde of them is horrifying to behold. Fractious in groups and individually weak, derro would have died out long

Warlock of the Great Old One Legacy

Monsters Volo's Guide to Monsters

, +7;{"diceNotation":"1d20+7","rollType":"to hit","rollAction":"Spellcasting"} to hit with spell attacks). It regains its expended spell slots when it finishes a short or long rest. It knows the

Hadar, crown of madness, clairvoyance, contact other plane, detect thoughts, dimension door, dissonant whispers, dominate beast, telekinesis, vampiric touch Whispering Aura. At the start of each of the

Yeenoghu Legacy

Monsters Out of the Abyss

— unless he becomes bored. The Beast of Butchery has a long rivalry with Baphomet, the Horned King, and the two demon lords and their followers attack one another on sight. The Gnoll Lord is

a humanoid spends at least 1 hour within 1 mile of the lair, that creature must succeed on a DC 17 Wisdom saving throw or descend into a madness determined by the Madness of Yeenoghu table. A

Oreioth

Monsters Princes of the Apocalypse

(3 slots): crown of madness, misty step 3rd level (3 slots): animate dead, vampiric touch Swift Animation (Recharges after a Long Rest). When a living Medium or Small humanoid within 30 feet of

Swarm of Cranium Rats

Monsters Mordenkainen Presents: Monsters of the Multiverse

points or fewer, plus 22 (5d8);{"diceNotation":"5d8", "rollType":"damage", "rollAction":"Bites", "rollDamageType":"psychic"} psychic damage. Spellcasting (Psionics). As long as it has more than half

, comprehend languages, detect thoughts 1/day each: confusion, dominate monsterMind flayers create cranium rat;cranium rats by bombarding rat;rats with psionic energy. Cranium rats are somewhat smarter than

Gith Legacy

Species Mordenkainen’s Tome of Foes

The story of the gith is rooted in a cruel twist of cosmic fate. Inspired by the great leader for whom the race is named, the gith rose up to overthrow the mind flayers that held them in

to plunder the Material Plane and other worlds, bringing treasures and slaves back to their ageless realm. At the same time, they hunt down and kill mind flayers whenever possible, as recompense for

Stolos

Monsters Infernal Machine Rebuild

;{"diceNotation":"1d20+7","rollType":"to hit","rollAction":"Spellcasting"} to hit with spell attacks). He regains its expended spell slots when it finishes a short or long rest. He knows the following warlock

, crown of madness, clairvoyance, contact other plane, detect thoughts, dimension door, dissonant whispers, dominate beast, telekinesis, vampiric touch Whispering Aura. At the start of each of Stolos's

Juiblex Legacy

Monsters Out of the Abyss

saving throw or become restrained. When a creature enters the area for the first time on a turn or ends its turn there, that creature must make the same save. A restrained creature is stuck as long as it

creature must succeed on a DC 18 Wisdom saving throw or descend into a madness determined by the Madness of Juiblex table. A creature that succeeds on this saving throw can’t be affected by this

Pudding King

Monsters Out of the Abyss

, ray of sickness, shield 2nd level (3 slots): crown of madness, misty step 3rd level (3 slots): gaseous form, stinking cloud 4th level (3 slots): blight, confusion 5th level (1 slot): cloudkillWar

this action. His statistics and capabilities are otherwise replaced by those of the new form. Create Green Slime (Recharges after a Long Rest). The Pudding King creates a patch of green slime. The slime appears on a section of wall, ceiling, or floor within 30 feet of the Pudding King.Acid, Poison

Deathlock Mastermind Legacy

Monsters Mordenkainen’s Tome of Foes

":"Spellcasting"} to hit with spell attacks). It regains its expended spell slots when it finishes a short or long rest. It knows the following warlock spells: Cantrips (at will): chill touch, mage hand

, minor illusion, poison spray 1st–5th level (2 5th-level slots): arms of Hadar, blight, counterspell, crown of madness, darkness, dimension door, dispel magic, fly, hold monster, invisibility Turn

Davil Starsong

Monsters Waterdeep: Dragon Heist

, minor illusion, vicious mockery 1st level (4 slots): cure wounds, disguise self, sleep 2nd level (3 slots): crown of madness, invisibility, suggestion 3rd level (3 slots): nondetection, sending

good at sniffing out lucrative business deals, and he makes friends easily. Like many sun elves, Davil has an affinity for magic and is gifted with the kind of patience that comes with a long life span

Psurlon Leader

Monsters Spelljammer: Adventures in Space

end of its body, and a superior intellect. Other psurlons look to the two-headed ones for leadership. Psurlons Psurlons are malevolent, wormlike creatures that were ejected from the Far Realm long

ago. They now live on the Astral Plane. They have legs that end in hooves and arms that end in hands with three long fingers. A psurlon’s eyeless head resembles that of an earthworm, capped by a

Yuan-ti Mind Whisperer Legacy

Monsters Volo's Guide to Monsters

;{"diceNotation":"1d20+5","rollType":"to hit","rollAction":"Spellcasting"} to hit with spell attacks). It regains its expended spell slots when it finishes a short or long rest. It knows the following warlock

, crown of madness, detect thoughts, expeditious retreat, fly, hypnotic pattern, illusory script Sseth's Blessing. When the yuan-ti reduces an enemy to 0 hit points, the yuan-ti gains 9 temporary hit

Duergar Stone Guard

Monsters Mordenkainen Presents: Monsters of the Multiverse

of Enlarge. Invisibility (Recharges after a Short or Long Rest). The duergar magically turns invisible for up to 1 hour or until it attacks, it forces a creature to make a saving throw, or its

been deeply impacted by their ancestors’ captivity and torment by mind flayers; they were infused with powerful psionic abilities but also a profound gloom. In some, this strain of sorrow

Drow Arachnomancer Legacy

Monsters Mordenkainen’s Tome of Foes

Change Shape (Recharges after a Short or Long Rest). The drow can use a bonus action to magically polymorph into a giant spider, remaining in that form for up to 1 hour. It can revert to its true

long rest. It knows the following warlock spells: Cantrips (at will): chill touch, eldritch blast, mage hand, poison spray 1st–5th level (3 5th-level slots): conjure animals (spiders only), crown of

Duergar Xarrorn

Monsters Mordenkainen Presents: Monsters of the Multiverse

-foot cone of fire or a line of fire 30 feet long and 5 feet wide. Each creature in that area must make a DC 12 Dexterity saving throw, taking 10 (3d6);{"diceNotation":"3d6", "rollType":"damage

", "rollAction":"Fire Spray", "rollDamageType":"fire"} fire damage on a failed save, or half as much damage on a successful one. Invisibility (Recharges after a Short or Long Rest). The duergar magically

Psurlon Ringer

Monsters Spelljammer: Adventures in Space

recognize it for what it is. Psurlons Psurlons are malevolent, wormlike creatures that were ejected from the Far Realm long ago. They now live on the Astral Plane. They have legs that end in

hooves and arms that end in hands with three long fingers. A psurlon’s eyeless head resembles that of an earthworm, capped by a maw ringed with teeth. Psurlons adorn themselves in richly colored

Psurlon

Monsters Spelljammer: Adventures in Space

each: disguise self, mage armor (self only) 1/day: suggestionPsurlons are malevolent, wormlike creatures that were ejected from the Far Realm long ago. They now live on the Astral Plane. They have

legs that end in hooves and arms that end in hands with three long fingers. A psurlon’s eyeless head resembles that of an earthworm, capped by a maw ringed with teeth. Psurlons adorn themselves in

Hydroloth Legacy

Monsters Mordenkainen’s Tome of Foes

, requiring no material components: At will: darkness, detect magic, dispel magic, invisibility (self only), water walk 3/day each: control water, crown of madness, fear, phantasmal killer, suggestion

higher than 5, they become 5. Each time the target finishes a long rest, it can repeat the saving throw, ending the effect on itself on a success. A greater restoration or remove curse spell cast on the

Encephalon Cluster

Monsters Phandelver and Below: The Shattered Obelisk

saving throw or have the prone condition. If this attack reduces the target to 0 hit points, the target immediately dies and is consumed by the cluster. Spawn Progeny (Recharges after a Short or Long Rest

and forgotten caverns, spewing warped progeny so it can multiply. As such, many mind flayers view encephalon clusters as insidious viruses. If left unchecked, a single encephalon cluster can quickly

Duergar Soulblade

Monsters Mordenkainen Presents: Monsters of the Multiverse

", "rollType":"damage", "rollAction":"Soulblade", "rollDamageType":"force"} force damage while under the effect of Enlarge. Invisibility (Recharges after a Short or Long Rest). The duergar magically turns

reaches of the Underdark and other sunless realms. Their personalities and abilities have been deeply impacted by their ancestors’ captivity and torment by mind flayers; they were infused with

Astral Elf Warrior

Monsters Spelljammer: Adventures in Space

Long ago, some elves ventured to the Astral Plane to be closer to their gods. There, they ceased to age and could exist indefinitely without sustenance. Astral elves were among the first creatures to

numerous invaders, including psurlons, mind flayers, and githyanki. When dealing with others, astral elves customarily cover their faces with ornate visors, becoming faceless extensions of their gods

Duergar Kavalrachni

Monsters Mordenkainen Presents: Monsters of the Multiverse

Invisibility (Recharges after a Short or Long Rest). The duergar magically turns invisible for up to 1 hour or until it attacks, it forces a creature to make a saving throw, or its concentration is

are dwarves of the deep reaches of the Underdark and other sunless realms. Their personalities and abilities have been deeply impacted by their ancestors’ captivity and torment by mind flayers

Hydroloth

Monsters Mordenkainen Presents: Monsters of the Multiverse

spellcasting ability (spell save DC 16): At will: darkness, detect magic, dispel magic, invisibility (self only) 3/day each: control water, crown of madness, fear, suggestion Steal Memory (1/Day

proficiencies; it can’t cast spells; it can’t understand language; and if its Intelligence and Charisma scores are higher than 5, they become 5. Each time the target finishes a long rest

Bugbear Legacy

Species Volo's Guide to Monsters

, bugbears are ambush predators accustomed to long periods of inactivity broken by short bursts of murderous energy. Ferocious though they may be, bugbears aren’t built for extended periods of exertion

, often a natural cave or an old bear den, and it might have supplementary dens elsewhere in its territory that it uses temporarily when it goes on long forays for food. In good times, a bugbear gang

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