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Neronvain

Monsters Tyranny of Dragons

"} poison damage. Poisonous Cloud (2/Day). Poison gas fills a 20-foot-radius sphere centered on a point Neronvain can see within 50 feet of him. The gas spreads around corners and remains until the start of

Neronvain’s next turn. Each creature that starts its turn in the gas must succeed on a DC 15 Constitution saving throw or be poisoned for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.Poison

Dretch Legacy

Monsters Basic Rules (2014)

Cloud (1/Day). A 10-foot radius of disgusting green gas extends out from the dretch. The gas spreads around corners, and its area is lightly obscured. It lasts for 1 minute or until a strong wind

disperses it. Any creature that starts its turn in that area must succeed on a DC 11 Constitution saving throw or be poisoned until the start of its next turn. While poisoned in this way, the target

Burnt Othur Fumes (Inhaled) Legacy

Equipment

A creature subjected to this poison must succeed on a DC 13 Constitution saving throw or take 10 (3d6) poison damage, and must repeat the saving throw at the start of each of its turns. On each

powder or releasing the gas subjects creatures in a 5-foot cube to its effect. The resulting cloud dissipates immediately afterward. Holding one's breath is ineffective against inhaled poisons, as they affect nasal membranes, tear ducts, and other parts of the body.

Stinking Cloud Legacy

Spells Basic Rules (2014)

You create a 20-foot-radius sphere of yellow, nauseating gas centered on a point within range. The cloud spreads around corners, and its area is heavily obscured. The cloud lingers in the air for the

duration. Each creature that is completely within the cloud at the start of its turn must make a Constitution saving throw against poison. On a failed save, the creature spends its action that turn

Brown Scavver

Monsters Spelljammer: Adventures in Space

start of each of the scavver’s turns from the poisonous gas in the scavver’s gullet. If the scavver takes 15 damage or more on a single turn from a creature inside it, the scavver must

gas, which kills off anything that survives being swallowed. Scavvers Scavvers are shark-like scavengers that fly through space, feeding on whatever they can fit in their mouths. Scavvers are not

Coral

Monsters Misplaced Monsters: Volume One

-smelling cloud of gas that surrounds and shields the target. The target has half cover until the gas disappears at the start of Coral’s next turn. Gift of Speech (1/Day). Coral targets one Beast she

target must succeed on a DC 16 Constitution saving throw or have the blinded condition until the start of Coral’s next turn. 5–6: Stink Bomb Shield. The bubbles transform into a foul

Animated Breath (Poison Form)

Monsters Fizban's Treasury of Dragons

Putrid Aura (Acid and Poison Forms Only). A creature that starts its turn within 5 feet of the animated breath must succeed on a DC 15 Constitution saving throw or be poisoned until the start of its

poison breath looks like billowing clouds of green gas, while a white dragon’s animated cold breath looks like a walking ice sculpture with frigid air whirling around it. A blue dragon’s

Dragonbone Golem

Monsters Fizban's Treasury of Dragons

creature is frightened until the start of its next turn. On a successful save, the creature is immune to this golem’s Fear Aura for the next 24 hours. Magic Resistance. The golem has advantage on

, each of which can restrain one target. If a creature is restrained by one of the pinions, the golem can’t attack with it. Any creature restrained by a pinion can free itself at the start of its

Otto

Monsters Waterdeep: Dungeon of the Mad Mage

":"1d6","rollType":"recharge","rollAction":"Euphoria Breath"}. Otto exhales a puff of euphoria gas at one creature within 5 feet of it. The target must succeed on a DC 11 Wisdom saving throw, or for 1

minute, the target can’t take reactions and must roll a d6;{"diceNotation":"1d6","rollType":"roll","rollAction":"Euphoria Breath"} at the start of each of its turns to determine its behavior during

Animated Breath (Acid Form)

Monsters Fizban's Treasury of Dragons

Putrid Aura (Acid and Poison Forms Only). A creature that starts its turn within 5 feet of the animated breath must succeed on a DC 15 Constitution saving throw or be poisoned until the start of its

breath looks like billowing clouds of green gas, while a white dragon’s animated cold breath looks like a walking ice sculpture with frigid air whirling around it. A blue dragon’s animated

Dragonflesh Abomination

Monsters Fizban's Treasury of Dragons

Cloying Miasma. The abomination is surrounded by a noxious stench. At the start of the abomination’s turn, any creature within 5 feet of it must succeed on a DC 14 Constitution saving throw or

be poisoned until the start of the abomination’s next turn. Regeneration. The abomination regains 10 hit points at the start of its turns if it has at least 1 hit point.Multiattack. The

Animated Breath (Fire Form)

Monsters Fizban's Treasury of Dragons

Fire Aura (Fire Form Only). At the start of each of the animated breath’s turns, each creature within 5 feet of it takes 3 (1d6);{"diceNotation":"1d6","rollType":"damage","rollAction":"Fire

’s is similar to a water elemental, but viscous and foul-looking. A green dragon’s animated poison breath looks like billowing clouds of green gas, while a white dragon’s animated

Eyestalk of Gzemnid

Monsters Planescape: Adventures in the Multiverse

","rollAction":"Bite","rollDamageType":"acid"} acid damage at the start of each of the eyestalk’s turns. If the eyestalk takes 30 damage or more on a single turn from a creature inside it, the

pile of fine violet dust.Gzemnid is a beholder god of deception, gases, and obscurement. The realm of the beholder deity Gzemnid lies beneath the Outlands. Most entrances into these mysterious, gas

Animated Breath

Monsters Fizban's Treasury of Dragons

Aura (Fire Form Only). At the start of each of the animated breath’s turns, each creature within 5 feet of it takes 3 (1d6);{"diceNotation":"1d6","rollType":"damage","rollAction":"Fire Aura

of the animated breath must succeed on a DC 15 Constitution saving throw or be poisoned until the start of its next turn. A creature that touches the animated breath or hits it with a melee attack

Catoblepas

Monsters Mordenkainen Presents: Monsters of the Multiverse

Stench. Any creature other than a catoblepas that starts its turn within 10 feet of the catoblepas must succeed on a DC 16 Constitution saving throw or be poisoned until the start of the creature

succeed on a DC 16 Constitution saving throw or be stunned until the start of the catoblepas’s next turn. Death Ray (Recharge 5–6);{"diceNotation":"1d6", "rollType":"recharge", "rollAction

Otyugh Mutate

Monsters Phandelver and Below: The Shattered Obelisk

Virulent Breath. Noxious gas from the mutate’s digestion of previous meals spews from its mouth. At the start of the mutate’s turn, each creature within 5 feet of it must succeed on a DC

Faerie Dragon (Younger) Legacy

Monsters Monster Manual (2014)

);{"diceNotation":"1d6","rollType":"recharge","rollAction":"Euphoria Breath"}. The dragon exhales a puff of euphoria gas at one creature within 5 feet of it. The target must succeed on a DC 11 Wisdom

saving throw, or for 1 minute, the target can’t take reactions and must roll a d6;{"diceNotation":"1d6","rollType":"roll","rollAction":"Euphoria Breath"} at the start of each of its turns to

Cosmic Horror

Monsters Spelljammer: Adventures in Space

the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. The horror regains spent legendary actions at the start of its turn

","rollAction":"Crushing Tentacle","rollDamageType":"force"} force damage on a failed save, or half as much damage on a successful one. Poison Jet (Costs 2 Actions). Foul gas squirts from the horror in a

Miirym

Monsters Candlekeep Mysteries

. Regeneration. Miirym regains 40 hit points at the start of her turn. If Miirym takes damage from a magic weapon or a spell, this trait doesn’t function at the start of Miirym’s next turn. Miirym

gas in a 90-foot cone. Each creature in that area must succeed on a DC 21 Constitution saving throw or be paralyzed for 1 minute. A creature can repeat the saving throw at the end of each of its turns

Tiamat

Monsters Tyranny of Dragons

the start of her turn.Multiattack. Tiamat can use her Frightful Presence. She then makes three attacks: two with her claws and one with her tail. Claw. Melee Weapon Attack: +19;{"diceNotation":"1d20

below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. Tiamat regains spent legendary actions at the start of her turn. Tiamat’s

Zuggtmoy Legacy

Monsters Out of the Abyss

, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. Zuggtmoy regains spent legendary actions at the start of her

), Zuggtmoy can take a lair action to cause one of the following effects; she can’t use the same effect two rounds in a row. Zuggtmoy causes four gas spore;gas spores or violet fungus;violet fungi

Zuggtmoy

Monsters Mordenkainen Presents: Monsters of the Multiverse

be used at a time and only at the end of another creature’s turn. Zuggtmoy regains spent legendary actions at the start of her turn. Attack. Zuggtmoy makes one Pseudopod attack. Exert Will

and make one weapon attack. Summon Fungi. Zuggtmoy causes four gas spore;gas spores or violet fungus;violet fungi (both appear in the Monster Manual) to appear in unoccupied spaces that she chooses

Storm Giant Quintessent

Monsters Mordenkainen Presents: Monsters of the Multiverse

at a time and only at the end of another creature’s turn. The giant regains spent legendary actions at the start of its turn. Gust. The giant targets a creature it can see within 60 feet of it

, dispersing itself into the storm surrounding its lair. The giant can end this effect at the start of any of its turns, becoming a giant once more and appearing in any location it chooses within its lair

Storm Giant Quintessent Legacy

Monsters Volo's Guide to Monsters

regains spent legendary actions at the start of its turn. Gust. The giant targets a creature it can see within 60 feet of it and creates a magical gust of wind around it. The target must succeed on a DC 18

, or half as much damage on a successful one. One with the Storm (3 Actions). The giant vanishes, dispersing itself into the storm surrounding its lair. The giant can end this effect at the start of any

Faerie Dragon (Older) Legacy

Monsters Monster Manual (2014)

;The dragon exhales a puff of euphoria gas at one creature within 5 feet of it. The target must succeed on a DC 11 Wisdom saving throw, or for 1 minute, the target can’t take reactions and must

roll a d6;{"diceNotation":"1d6","rollType":"roll","rollAction":"Euphoria Breath"} at the start of each of its turns to determine its behavior during the turn: 1–4. The target takes no

Nightmare Beast

Monsters Monstrous Compendium Vol. 1: Spelljammer Creatures

option can be used at a time and only at the end of another creature’s turn. The beast regains spent legendary actions at the start of its turn. Tusk Attack. The beast makes one Tusk attack

exhales a cloud of magical fear gas in a 120-foot cone. Any creature in that area must succeed on a DC 18 Wisdom saving throw or be frightened of the beast for 1 minute. A creature can repeat the

Unspeakable Horror (Aberrant Armor)

Monsters Van Richten’s Guide to Ravenloft

bile takes 31 (7d8);{"diceNotation":"7d8","rollType":"damage","rollAction":"Bile Hex","rollDamageType":"acid"} acid damage at the start of each of its turns until it or another creature uses its

action to scrape or wash off the bile that covers it. Petrifying Hex (Recharge 5–6);{"diceNotation":"1d6","rollType":"recharge","rollAction":"Petrifying Hex"}. The horror expels petrifying gas in a 30

Unspeakable Horror (Malleable Mass)

Monsters Van Richten’s Guide to Ravenloft

","rollDamageType":"acid"} acid damage at the start of each of its turns until it or another creature uses its action to scrape or wash off the bile that covers it. Petrifying Hex (Recharge 5–6

);{"diceNotation":"1d6","rollType":"recharge","rollAction":"Petrifying Hex"}. The horror expels petrifying gas in a 30-foot cone. Each creature in that area must succeed on a DC 15 Constitution saving throw

Unspeakable Horror Legacy

monsters Van Richten’s Guide to Ravenloft

covered in bile takes 31 (7d8);{"diceNotation":"7d8","rollType":"damage","rollAction":"Bile Hex","rollDamageType":"acid"} acid damage at the start of each of its turns until it or another creature uses

its action to scrape or wash off the bile that covers it. Petrifying Hex (Recharge 5–6);{"diceNotation":"1d6","rollType":"recharge","rollAction":"Petrifying Hex"}. The horror expels petrifying gas in

Silver Greatwyrm

Monsters Fizban's Treasury of Dragons

, or half as much damage on a successful one. Sapping Breath. The greatwyrm exhales gas in a 300-foot cone. Each creature in that area must make a DC 25 Constitution saving throw. On a failed save

, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. The greatwyrm regains spent legendary actions at the start

Ancient Gold Dragon Legacy

Monsters Basic Rules (2014)

one. Weakening Breath. The dragon exhales gas in a 90-foot cone. Each creature in that area must succeed on a DC 24 Strength saving throw or have disadvantage on Strength-based attack rolls, Strength

regains spent legendary actions at the start of its turn. Detect. The dragon makes a Wisdom (Perception) check. Tail Attack. The dragon makes a tail attack. Wing Attack (Costs 2 Actions). The dragon

Unspeakable Horror (Loathsome Limbs)

Monsters Van Richten’s Guide to Ravenloft

the start of each of its turns until it or another creature uses its action to scrape or wash off the bile that covers it. Petrifying Hex (Recharge 5–6);{"diceNotation":"1d6","rollType":"recharge

","rollAction":"Petrifying Hex"}. The horror expels petrifying gas in a 30-foot cone. Each creature in that area must succeed on a DC 15 Constitution saving throw or take 14 (4d6);{"diceNotation":"4d6

Unspeakable Horror (Oozing Organs)

Monsters Van Richten’s Guide to Ravenloft

. A creature covered in bile takes 31 (7d8);{"diceNotation":"7d8","rollType":"damage","rollAction":"Bile Hex","rollDamageType":"acid"} acid damage at the start of each of its turns until it or another

petrifying gas in a 30-foot cone. Each creature in that area must succeed on a DC 15 Constitution saving throw or take 14 (4d6);{"diceNotation":"4d6","rollType":"damage","rollAction":"Petrifying Hex

Ancient Silver Dragon Legacy

Monsters Basic Rules (2014)

exhales paralyzing gas in a 90-foot cone. Each creature in that area must succeed on a DC 24 Constitution saving throw or be paralyzed for 1 minute. A creature can repeat the saving throw at the end of each

action option can be used at a time and only at the end of another creature's turn. The dragon regains spent legendary actions at the start of its turn. Detect. The dragon makes a Wisdom (Perception

Stalagma Steelshadow

Monsters Waterdeep: Dungeon of the Mad Mage

exhales paralyzing gas in a 60-foot cone. Each creature in that area must succeed on a DC 20 Constitution saving throw or be paralyzed for 1 minute. A creature can repeat the saving throw at the end of

action option can be used at a time and only at the end of another creature's turn. The dragon regains spent legendary actions at the start of its turn. Detect. The dragon makes a Wisdom (Perception

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