before become diffusing contained reduced

Staff of the Python

Magic Items Dungeon Master’s Guide

As a Magic action, you can throw this staff so that it lands in an unoccupied space within 10 feet of you, causing the staff to become a Giant Constrictor Snake in that space. The snake is under your

for 1 hour. If the snake is reduced to 0 Hit Points, it dies and reverts to its staff form; the staff then shatters and is destroyed. If the snake reverts to staff form before losing all its Hit Points, it regains all of them.

Book of Exalted Deeds

Magic Items Dungeon Master’s Guide

that tries to read from the book takes 24d6 Radiant damage. This damage ignores Resistance and Immunity, and it can’t be reduced or avoided by any means. A creature reduced to 0 Hit Points by

benefits granted by the book. Celestial Calm. While attuned to the book, you have Immunity to the Charmed and Frightened conditions and Resistance to Psychic damage. These benefits become permanent

Mirror of Life Trapping

Magic Items Dungeon Master’s Guide

damage, and Vulnerability to Bludgeoning damage. It shatters and is destroyed when reduced to 0 Hit Points. If the mirror is hanging on a vertical surface and you are within 5 feet of it, you can take a

or call out a particular cell by number. The creature named or contained in the named cell appears as an image on the mirror’s surface. You and the creature can then communicate. In a similar

Vampire

Monsters Monster Manual

, the vampire uses Shape-Shift to become mist (no action required). If it can’t use Shape-Shift, it is destroyed. While it has 0 Hit Points in mist form, it can’t return to its vampire form

equal to that amount. A Humanoid reduced to 0 Hit Points by this damage and then buried rises the following sunset as a Vampire Spawn under the vampire’s control.Legendary Action Uses: 3 (4 in Lair

Eye and Hand of Vecna

Magic Items Dungeon Master’s Guide

your body, devours it, and then takes control of the body like a puppet. If that happens, you become an NPC under the DM’s control. Eye of Vecna Spells Spell Charge Cost

damage on a failed save or half as much damage on a successful one. A creature reduced to 0 Hit Points by this damage is transformed into green slime (see chapter 3) that covers the ground in its

Deck of Many Things

Magic Items Dungeon Master’s Guide

and become entombed in a state of suspended animation in an extradimensional sphere. Everything you’re wearing and carrying disappears with you except for Artifacts, which stay behind in the space

an ally. As Dungeon Master, you should wait for a dramatically appropriate moment to reveal this enmity, leaving the adventurer guessing who is likely to become a betrayer. Fool. You have

Demonomicon of Iggwilv

Magic Items Dungeon Master’s Guide

Fiend that you can see that is trapped within the area of a Magic Circle spell. The Fiend must succeed on a DC 20 Charisma saving throw with Disadvantage or become trapped within one of the Demonomicon

lies a long-lost Artifact, Fraz-Urb’luu’s Staff. If the staff is dragged from the pocket plane, the tome is reduced to a mundane and out-of-date copy of the Tome of Zyx, the work that

Sammaster (Dracolich Form)

Monsters Forgotten Realms: Adventures in Faerûn

until he is reduced to 0 Hit Points. If Sammaster is reduced to 0 Hit Points, his dracolich form dissolves to dust. After 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Soul Gem"} days

Immunity to Acid, Necrotic, Poison, and Psychic damage. The gem regains all its Hit Points at the end of every turn, but it turns to dust if reduced to 0 Hit Points.Multiattack. Sammaster makes three Rend

Sammaster (Lich Form)

Monsters Forgotten Realms: Adventures in Faerûn

Resistance. Sammaster has Advantage on saving throws against spells and other magical effects. Soul Gem. If Sammaster is reduced to 0 Hit Points while his magical soul gem exists, his lich form dissolves

Tiny object that has AC 20; HP 50; and Immunity to Acid, Necrotic, Poison, and Psychic damage. The gem regains all its Hit Points at the end of every turn, but it turns to dust if reduced to 0 Hit Points

Vampire Infernalist

Monsters Astarion's Book of Hungers

, the vampire uses Shape-Shift to become mist (no action required). If it can’t use Shape-Shift, it is destroyed. While it has 0 Hit Points in mist form, it can’t return to its vampire form

(if any). The target’s Hit Point maximum decreases by an amount equal to the Necrotic damage taken, and the vampire regains Hit Points equal to that amount. A Humanoid reduced to 0 Hit Points by

Torpor (Ingested) Legacy

Equipment

A creature subjected to this poison must succeed on a DC 15 Constitution saving throw or become poisoned for 4d6 hours. The poisoned creature is incapacitated. Ingested. A creature must swallow an

entire dose of ingested poison to suffer its effects. The dose can be delivered in food or a liquid. You may decide that a partial dose has a reduced effect, such as allowing advantage on the saving throw or dealing only half damage on a failed save.

Truth Serum (Ingested) Legacy

Equipment

A creature subjected to this poison must succeed on a DC 11 Constitution saving throw or become poisoned for 1 hour. The poisoned creature can't knowingly speak a lie, as if under the effect of a

reduced effect, such as allowing advantage on the saving throw or dealing only half damage on a failed save.

Loadstone

Magic Items Tales from the Yawning Portal

. If you use the Dash or Disengage action while the stone is on your person, its curse activates. Until the curse is broken with remove curse or similar magic, your speed is reduced by 5 feet, and your maximum load and maximum lift capacities are halved. You also become unwilling to part with the stone.

Baba Lysaga's Creeping Hut

Monsters Curse of Strahd

, drink, or sleep. The magic that animates an object is dispelled when the construct drops to 0 hit points. An animated object reduced to 0 hit points becomes inanimate and is too damaged to be of much use

contained in a cavity in the stump, beneath the rotted floorboards of the hut. The floorboards can be ripped up with a successful DC 14 Strength check or smashed by dealing 10 damage to them. Once the

Mirror of Life Trapping Legacy

Magic Items Basic Rules (2014)

. It shatters and is destroyed when reduced to 0 hit points. If the mirror is hanging on a vertical surface and you are within 5 feet of it, you can use an action to speak its command word and activate

unoccupied spaces near it. While within 5 feet of the mirror, you can use an action to speak the name of one creature trapped in it or call out a particular cell by number. The creature named or contained in

Bulezau Legacy

Monsters Mordenkainen’s Tome of Foes

become poisoned until the disease ends. While poisoned in this way, the target sports festering boils, coughs up flies, and sheds rotting skin, and the target must repeat the saving throw after every 24

hours that elapse. On a successful save, the disease ends. On a failed save, the target's hit point maximum is reduced by 4 (1d8);{"diceNotation":"1d8","rollType":"roll","rollAction":"Barbed Tail"}. The target dies if its hit point maximum is reduced to 0.PoisonCold, Fire, Lightning

Pale Tincture (Ingested) Legacy

Equipment

A creature subjected to this poison must succeed on a DC 16 Constitution saving throw or take 3 (1d6) poison damage and become poisoned. The poisoned creature must repeat the saving throw every 24

has a reduced effect, such as allowing advantage on the saving throw or dealing only half damage on a failed save.

Living Demiplane

Monsters Icewind Dale: Rime of the Frostmaiden

and psychic damage, and immunity to bludgeoning, piercing, and slashing damage that is nonmagical. If any section is reduced to 0 hit points, the living spell and its chamber are destroyed (see

-foot-square section of its extradimensional chamber is reduced to 0 hit points, or when the living spell has no surface to attach to. When the living spell is destroyed, the contents of its

Book of Vile Darkness Legacy

Magic Items Dungeon Master’s Guide (2014)

the book’s contents, provided that those modifications advance evil and expand the lore already contained within. Whenever a non-evil creature attunes to the Book of Vile Darkness, that creature

darkness. An evil rune might appear on your face, your eyes might become glossy black, or horns might sprout from your forehead. Or you might become wizened and hideous, lose all facial features, gain a

Nightwalker Legacy

Monsters Mordenkainen’s Tome of Foes

to this aura. Life Eater. A creature reduced to 0 hit points from damage dealt by the nightwalker dies and can't be revived by any means short of a wish spell.Multiattack. The nightwalker uses

on a DC 21 Constitution saving throw or its hit point maximum is reduced by an amount equal to the necrotic damage taken. This reduction lasts until the target finishes a long rest. Finger of Doom

Rutterkin Legacy

Monsters Mordenkainen’s Tome of Foes

":"damage","rollAction":"Bite","rollDamageType":"piercing"} piercing damage. If the target is a creature, it must succeed on a DC 13 Constitution saving throw against disease or become poisoned. At the end

of each long rest, the poisoned target can repeat the saving throw, ending the effect on itself on a success. If the target is reduced to 0 hit points while poisoned in this way, it dies and instantly

Spirit Statue Mascot

Monsters Strixhaven: A Curriculum of Chaos

Death Burst. When the spirit statue is reduced to 0 hit points, the statue crumbles, and the spirit returns to the afterlife in a burst of ghostly white flame. Each creature within 5 feet of it must

tacticians. Regardless, their appearance is so common around the Lorehold campus that they have become the college’s mascots.

Bulezau

Monsters Mordenkainen Presents: Monsters of the Multiverse

is a creature, it must succeed on a DC 13 Constitution saving throw against disease or become poisoned until the disease ends. While poisoned in this way, the target sports festering boils, coughs up

maximum is reduced by 4 (1d8);{"diceNotation":"1d8", "rollType":"roll", "rollAction":"Barbed Tail"} until the disease ends on the target. The target dies if its hit point maximum is reduced to 0.Diseased

Reduced-threat Wight

Monsters Tales from the Yawning Portal

Sunlight Sensitivity. While in sunlight, the wight has disadvantage on attack rolls, as well as on Wisdom (Perception) checks that rely on sight. Reduced Threat. This creature has -2 penalty on all

","rollDamageType":"necrotic"} necrotic damage. The target must succeed on a DC 11 Constitution saving throw or its hit point maximum is reduced by an amount equal to the damage taken. This reduction lasts

Rutterkin

Monsters Mordenkainen Presents: Monsters of the Multiverse

disease or become poisoned. At the end of each long rest, the poisoned target can repeat the saving throw, ending the effect on itself on a success. If the target is reduced to 0 hit points while

influence of the Abyss. Victims afflicted with the disease experience tremendous pain as their bodies become disfigured, flesh twisting around the bones, until they transform to join the mass of

Yagnoloth Legacy

Monsters Mordenkainen’s Tome of Foes

target is a creature, it must succeed on a DC 16 Constitution saving throw or become stunned until the end of the yagnoloth's next turn. Life Leech. The yagnoloth touches one incapacitated creature

points equal to half the damage dealt. The target must succeed on a DC 16 Constitution saving throw, or its hit point maximum is reduced by an amount equal to the damage taken. This reduction lasts

Martial Arts Adept

Monsters Mordenkainen Presents: Monsters of the Multiverse

by a ranged weapon attack, the adept deflects the missile. The damage it takes from the attack is reduced by 1d10 + 3;{"diceNotation":"1d10+3","rollType":"roll","rollAction":"Deflect Missile"}. If the

damage is reduced to 0, the adept catches the missile if it’s small enough to hold in one hand and the adept has a hand free.Martial arts adepts are disciplined monks with extensive training in

Otyugh Mutate

Monsters Phandelver and Below: The Shattered Obelisk

":"roll", "rollAction":"Bite"} on a failure. On a successful save, the target is no longer poisoned. The target dies if its hit point maximum is reduced to 0. This reduction to the target’s hit

metamorphosis as the powers of the Far Realm rewrite the fundamentals of the creature’s existence. Any creature can become a mutate and transform to exhibit physical characteristics associated

Reduced-threat Otyugh

Monsters Tales from the Yawning Portal

receiving creature to telepathically respond. Reduced Threat. This creature has -2 penalty on all ability checks and saving throws.Multiattack. The otyugh makes three attacks: one with its bite and two with

":"damage","rollAction":"Bite","rollDamageType":"piercing"} piercing damage. If the target is a creature, it must succeed on a DC 13 Constitution saving throw against disease or become poisoned until the

Fractine

Monsters Monstrous Compendium Vol. 1: Spelljammer Creatures

. A fractine can also imprison a creature inside a demiplane contained within its two-dimensional form, the prisoner’s distorted reflection visible in the fractine’s glassy surface

, and the fractine can’t be harmed from within the demiplane. The fractine can imprison only one creature at a time and can release that creature as a bonus action. If the fractine is reduced

Reduced-threat Vrock

Monsters Tales from the Yawning Portal

Magic Resistance. The vrock has advantage on saving throws against spells and other magical effects. Reduced Threat. This creature has -2 penalty on all ability checks and saving throws.Multiattack

in that area must succeed on a DC 12 Constitution saving throw or become poisoned. While poisoned in this way, a target takes 5 (1d10);{"diceNotation":"1d10","rollType":"damage","rollAction":"Spores

Tlacatecolo

Monsters Journeys through the Radiant Citadel

transforms into a Medium owl, while retaining its game statistics (other than its size). This transformation ends if the tlacatecolo is reduced to 0 hit points or if it uses its action to end it. Plague

damage and become poisoned. While poisoned in this way, the creature can’t regain hit points. At the end of every hour, the creature must succeed on a DC 13 Constitution saving throw or gain 1

Nightwalker

Monsters Mordenkainen Presents: Monsters of the Multiverse

","rollAction":"Annihilating Aura","rollDamageType":"necrotic"} necrotic damage. Undead are immune to this aura. Life Eater. A creature dies if reduced to 0 hit points by the nightwalker and can’t

or its hit point maximum is reduced by an amount equal to the necrotic damage taken. This reduction lasts until the target finishes a long rest. The target dies if its hit point maximum is reduced to

Enucleator Modifications

Equipment

manifest a power. Once they become invisible in this way, they can’t do so again until they finish a long rest. Redundant Organs. The creature gains an extra heart, liver, spleen, or other

essential organ, granting them advantage on death saving throws. Relentless Toughness. The creature is infused with troll essence. If they are reduced to 0 hit points by damage other than acid or fire

Skeletal Knight

Monsters Dragonlance: Shadow of the Dragon Queen

damage.Skeletal knights are powerful Undead that arise to serve even more wicked beings—often death knight;death knights. Those who become skeletal knights were typically virtuous in life but betrayed

free to pursue its own ends. Skeletal knights are relentless in battle and difficult to destroy. They cling to the sins that curse them, and they fight until their skulls are reduced to shards. Their

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