decreases immune are brain

Chasme

Monsters Monster Manual

target is a creature, its Hit Point maximum decreases by an amount equal to the Necrotic damage taken.PoisonCold, Fire, LightningDrone. Constitution Saving Throw: DC 12, each creature in a 30-foot

succeeds automatically after 10 minutes or if it takes damage or a creature within 5 feet of it takes an action to empty a flask of Holy Water on it. Success: The target is immune to this chasme’s Drone for 24 hours.

Mummy

Monsters Monster Manual

maximum doesn’t return to normal when finishing a Long Rest, and its Hit Point maximum decreases by 10 (3d6);{"diceNotation":"3d6", "rollType":"roll", "rollAction":"Rotting Fist"} every 24 hours

has the Frightened condition until the end of the mummy’s next turn. Success: The target is immune to this mummy’s Dreadful Glare for 24 hours.Necrotic, PoisonFire

Cranium Rat

Monsters Mordenkainen Presents: Monsters of the Multiverse

Telepathic Shroud. The cranium rat is immune to any effect that would sense its emotions or read its thoughts, as well as to all divination spells.Bite. Melee Weapon Attack: +4;{"diceNotation":"1d20

eyes and ears for the colony’s elder brain, transmitting their thoughts when they swarm and are within range of the elder brain’s telepathy.Illumination. The cranium rat sheds dim light from its exposed brain in a 5-foot radius or extinguishes the light.

Swarm of Cranium Rats

Monsters Mordenkainen Presents: Monsters of the Multiverse

temporary hit points. Telepathic Shroud. The swarm is immune to any effect that would sense its emotions or read its thoughts, as well as to all divination spells.Bites. Melee Weapon Attack: +5

rats as spies. The rats invade communities and act as eyes and ears for the colony’s elder brain, transmitting their thoughts when they swarm and are within range of the elder brain’s

Cranium Rat Squeaker

Monsters Planescape: Adventures in the Multiverse

words and emotions. Telepathic Shroud. The cranium rat is immune to any effect that would sense its emotions or read its thoughts, as well as to divination spells.Bite. Melee Weapon Attack: +4

large numbers, their cranium rat squeaker swarm;swarms merge into a single intelligence with enhanced psionic abilities and the accumulated memories of its constituents.Illumination. The cranium rat sheds dim light from its exposed brain in a 5-foot radius or extinguishes the light.

Vargouille Reflection

Monsters Planescape: Adventures in the Multiverse

condition. The target must succeed on a DC 12 Charisma saving throw or become cursed. The cursed target’s Charisma decreases by 1 after each hour, as its head takes on fiendish aspects, and its Charisma

saving throw is successful or if the effect ends on it, the target is immune to the Horrific Reflection of all vargouille reflections for 1 hour.Vargouille;Vargouilles are flying Fiends that resemble

Centaur Mummy

Monsters Tales from the Yawning Portal

cursed target can't regain hit points, and its hit point maximum decreases by 10 (3d6);{"diceNotation":"3d6","rollType":"roll","rollAction":"Hooves"} for every 24 hours that elapse. If the curse reduces

next turn. If the target fails the saving throw by 5 or more, it is also paralyzed for the same duration. A target that succeeds on the saving throw is immune to the Dreadful Glare of all mummies (but

Nafik

Monsters Quests from the Infinite Staircase

throw or be cursed with mummy rot. The cursed target can’t regain hit points, and its hit point maximum decreases by 10 (3d6);{"diceNotation":"3d6", "rollType":"roll", "rollAction":"Rotting Fist

next turn. A target that succeeds on the saving throw is immune to Nafik’s Dreadful Glare for the next 24 hours. Spellcasting. Nafik casts one of the following spells, using Wisdom as the

Diderius

Monsters Tyranny of Dragons

decreases by 10 (3d6);{"diceNotation":"3d6","rollType":"roll","rollAction":"Rotting Fist"} for every 24 hours that elapse. If the curse reduces the target’s hit point maximum to 0, the target

, it is also paralyzed for the same duration. A target that succeeds on the saving throw is immune to the Dreadful Glare of all mummies and mummy lords for the next 24 hours.Diderius can take 3

Fungal Servant

Monsters Candlekeep Mysteries

target can’t regain hit points, and its hit point maximum decreases by 10 3d6;{"diceNotation":"3d6","rollType":"roll","rollAction":"Hit Point Reduction"} for every 24 hours that elapse. If the

the end of the fungal servant’s next turn. If the target fails the saving throw by 5 or more, it is also paralyzed for the same duration. A target that succeeds on the saving throw is immune to

Gorka Tharn

Monsters Waterdeep: Dungeon of the Mad Mage

, and its hit point maximum decreases by 10 (3d6);{"diceNotation":"3d6","rollType":"roll","rollAction":"Rotting Fist"} for every 24 hours that elapse. If the curse reduces the target's hit point maximum

saving throw by 5 or more, it is also paralyzed for the same duration. A target that succeeds on the saving throw is immune to the Dreadful Glare of all mummies and mummy lords for the next 24 hours

Valin Sarnaster

Monsters Candlekeep Mysteries

succeed on a DC 16 Constitution saving throw or be cursed with mummy rot. The cursed target can’t regain hit points, and its hit point maximum decreases by 10 (3d6);{"diceNotation":"3d6

that succeeds on the saving throw is immune to the Dreadful Glare of all mummies and mummy lords for the next 24 hours.Valin Sarnaster can take 3 legendary actions, choosing from the options below

Duergar Mind Master

Monsters Mordenkainen Presents: Monsters of the Multiverse

make one weapon attack against another creature the duergar can see or to move up to 10 feet in a direction of the duergar’s choice. Creatures that can’t be charmed are immune to this

the materials used and honest about their purpose.PoisonReduce (Recharges after a Short or Long Rest). For 1 minute, the duergar magically decreases in size, along with anything it is wearing or

Zuggtmoy

Monsters Mordenkainen Presents: Monsters of the Multiverse

a victim’s brain, turning it into a fanatic servitor. Each victim gains the Spore Kissed trait. Spore Kissed. This creature is immune to the charmed and frightened conditions. In addition

Blue Slaad (control gem variant) Legacy

Monsters Monster Manual (2014)

point. Control Gem. Implanted in the slaad's brain is a magic control gem. The slaad must obey whoever possesses the gem and is immune to being charmed while so controlled. Certain spells can be used to

trait. Control Gem. Implanted in the slaad's brain is a magic control gem. The slaad must obey whoever possesses the gem and is immune to being charmed while so controlled. Certain spells can be used to

Cranium Rat Legacy

Monsters Volo's Guide to Monsters

Illumination. As a bonus action, the cranium rat can shed dim light from its brain in a 5-foot radius or extinguish the light. Telepathic Shroud. The cranium rat is immune to any effect that would

Red Slaad (control gem variant) Legacy

Monsters Monster Manual (2014)

point. Control Gem. Implanted in the slaad's brain is a magic control gem. The slaad must obey whoever possesses the gem and is immune to being charmed while so controlled. Certain spells can be used to

stone magically implants a fragment of itself in the slaad's brain. This fragment takes the form of a magic gem roughly the size and shape of a human child's fist. The gem is the same color as the

Gray Slaad (control gem variant) Legacy

Monsters Monster Manual (2014)

. Regeneration. The slaad regains 10 hit points at the start of its turn if it has at least 1 hit point. Control Gem. Implanted in the slaad’s brain is a magic control gem. The slaad must obey

whoever possesses the gem and is immune to being charmed while so controlled. Certain spells can be used to acquire the gem. If the slaad fails its saving throw against imprisonment, the spell can

Death Slaad (control gem variant) Legacy

Monsters Monster Manual (2014)

Gem. Implanted in the slaad's brain is a magic control gem. The slaad must obey whoever possesses the gem and is immune to being charmed while so controlled. Certain spells can be used to acquire the

, the stone magically implants a fragment of itself in the slaad's brain. This fragment takes the form of a magic gem roughly the size and shape of a human child's fist. The gem is the same color as the

Green Slaad (control gem variant) Legacy

Monsters Monster Manual (2014)

slaad's brain is a magic control gem. The slaad must obey whoever possesses the gem and is immune to being charmed while so controlled. Certain spells can be used to acquire the gem. If the slaad

fragment of itself in the slaad's brain. This fragment takes the form of a magic gem roughly the size and shape of a human child's fist. The gem is the same color as the slaad. Another creature can use

Mummy Legacy

Monsters Basic Rules (2014)

cursed with mummy rot. The cursed target can't regain hit points, and its hit point maximum decreases by 10 (3d6);{"diceNotation":"3d6","rollType":"roll","rollAction":"Rotting Fist"} for every 24

end of the mummy's next turn. If the target fails the saving throw by 5 or more, it is also paralyzed for the same duration. A target that succeeds on the saving throw is immune to the Dreadful Glare

Duergar Mind Master Legacy

Monsters Mordenkainen’s Tome of Foes

direction of the duergar's choice. Creatures that can't be charmed are immune to this effect. Reduce (Recharges after a Short or Long Rest). For 1 minute, the duergar magically decreases in size, along

Mummy Lord Legacy

Monsters Basic Rules (2014)

, and its hit point maximum decreases by 10 (3d6);{"diceNotation":"3d6","rollType":"roll","rollAction":"Rotting Fist"} for every 24 hours that elapse. If the curse reduces the target's hit point maximum

saving throw by 5 or more, it is also paralyzed for the same duration. A target that succeeds on the saving throw is immune to the Dreadful Glare of all mummies and mummy lords for the next 24 hours.The

Wish Legacy

Spells Basic Rules (2014)

could make yourself and all your companions immune to a lich's life drain attack. You undo a single recent event by forcing a reroll of any roll made within the last round (including your last turn

to 3, if it isn't 3 or lower already, for 2d4 days. For each of those days that you spend resting and doing nothing more than light activity, your remaining recovery time decreases by 2 days. Finally, there is a 33 percent chance that you are unable to cast wish ever again if you suffer this stress.

Zuggtmoy

Compendium - Sources->Dungeons & Dragons->Mordenkainen's Tome of Foes

), plant growth (3rd level) Zuggtmoy’s followers are primarily mindless victims of her children’s strange spores. The spores burrow into a victim’s brain, turning it into a fanatic servitor. Each victim

gains the Spore Kissed trait. Spore Kissed. This creature is immune to the charmed and frightened conditions. In addition, if it is reduced to 0 hit points, each creature within 10 feet of it takes poison damage equal to its number of Hit Dice.

Slaadi

Compendium - Sources->Dungeons & Dragons->Monster Manual (2014)

trait. Control Gem. Implanted in the slaad’s brain is a magic control gem. The slaad must obey whoever possesses the gem and is immune to being charmed while so controlled. Certain spells can be

creation and either doesn’t perceive the slaadi as threats or chooses to ignore them. Embedded in a slaad’s brain is a magic gem. Acquire it, and the slaad is yours to command. VARIANT

Cranium Rats

Compendium - Sources->Dungeons & Dragons->Volo's Guide to Monsters

cranium rat can shed dim light from its brain in a 5-foot radius or extinguish the light. Telepathic Shroud. The cranium rat is immune to any effect that would sense its emotions or read its thoughts, as

“us.” Spies for an Elder Brain. Mind flayer colonies use cranium rats as spies. The rats invade surface communities and act as eyes and ears for the elder brain, transmitting their thoughts when they

Meenlock

Compendium - Sources->Dungeons & Dragons->Volo's Guide to Monsters

and take actions and reactions as normal. This torment has no effect on a creature that is immune to the frightened condition. If the creature is susceptible and remains incapacitated for 1 hour, the

no eternal communion with an elder brain is possible. The road to lichdom offers a way to escape the permanency of death, but that path is long and solitary. Alhoons are mind flayers that use a

Cranium Rats

Compendium - Sources->Dungeons & Dragons->Monsters of the Multiverse

(+0) CHA 8 (-1) Senses darkvision 30 ft., passive Perception 10 Languages telepathy 30 ft. Challenge 0 (10 XP) Proficiency Bonus +2 Telepathic Shroud. The cranium rat is immune to any

. Bonus Actions Illumination. The cranium rat sheds dim light from its exposed brain in a 5-foot radius or extinguishes the light. A single cranium rat uses its natural telepathy to communicate hunger

The Gnawing Plague

Compendium - Sources->Dungeons & Dragons->Van Richten’s Guide to Ravenloft

creature must make a DC 10 Constitution saving throw. On a failed save, the creature gains 1 level of exhaustion. On a successful save, the creature’s exhaustion level decreases by 1. If a successful

saving throw reduces the infected creature’s level of exhaustion below 1, the creature recovers from the disease. Immunity. All forms of rats and wererats are immune to the Gnawing Plague. Wearing a mask curtails the plague but not wererats

Ilvaash's Anima

Compendium - Sources->Dungeons & Dragons->Phandelver and Below: The Shattered Obelisk

blindsight out to a range of 60 feet. Voalsh is immune to the prone condition and has a flying speed of 30 feet. Each fanatic’s position depends on how many fragments of the Netherese obelisk they’ve

produces a fresh Humanoid brain from an extraplanar repository. The brain slowly squelches from the tube and, if not caught, plops onto the ground. Each tube can produce a maximum of one brain per hour

Spire of Iriolarthas (Y19a-Y19h)

Compendium - Sources->Dungeons & Dragons->Icewind Dale: Rime of the Frostmaiden

move through the air. Housed in each cylinder is a swollen human brain floating in a bath of slimy, translucent goo. Three Netherese wizards chose to continue their revels into undeath, each one

becoming a brain in a jar (see appendix C). The three wizards have been driven mad by their undead existence. Dispelling the illusion drives them into a furious rage. Visitors who ruin the ball in any

Duergar Mind Master

Compendium - Sources->Dungeons & Dragons->Mordenkainen's Tome of Foes

are immune to this effect. Reduce (Recharges after a Short or Long Rest). For 1 minute, the duergar magically decreases in size, along with anything it is wearing or carrying. While reduced, the

Mummy

Compendium - Sources->Dungeons & Dragons->Monster Manual

creature, it is cursed. While cursed, the target can’t regain Hit Points, its Hit Point maximum doesn’t return to normal when finishing a Long Rest, and its Hit Point maximum decreases by 10 (3d6) every 24

: The target has the Frightened condition until the end of the mummy’s next turn. Success: The target is immune to this mummy’s Dreadful Glare for 24 hours.

Vargouille Reflection

Compendium - Sources->Dungeons & Dragons->Planescape: Adventures in the Multiverse->Morte’s Planar Parade

cursed. The cursed target’s Charisma decreases by 1 after each hour, as its head takes on fiendish aspects, and its Charisma can’t increase. The curse doesn’t advance while the target is in sunlight or the

until the vargouille loses concentration (as if concentrating on a spell). If the target’s saving throw is successful or if the effect ends on it, the target is immune to the Horrific Reflection of all vargouille reflections for 1 hour. Adrián Ibarra Lugo

D&D Beyond

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