course which round

Control Water

Spells Player’s Handbook

separated water forms a wall to either side. The trench remains until the spell ends or you choose a different effect. The water then slowly fills in the trench over the course of the next round until

Merrenoloth

Monsters Mordenkainen Presents: Monsters of the Multiverse

waterThe grim captains of the ferries on the River Styx, merrenoloths can navigate safely through the worst storms and always stay on course. Wielding fiery oars, merrenoloths strike fear into anyone

take the same lair action two rounds in a row: Gale. The air within 60 feet of the vessel is filled with wind. Until initiative count 20 on the next round, that area is difficult terrain, and when a

Adult Time Dragon

Monsters Planescape: Adventures in the Multiverse

succeeds on three of these saves.The dragon can take up to three reactions per round but only one per turn. Reactive Rend. After using Legendary Resistance or in response to being hit by an attack

damage and move 1 round forward in time. A target moved forward in time vanishes for the duration. When the effect ends, the target reappears in the space it left or in an unoccupied space nearest to

Ancient Time Dragon

Monsters Planescape: Adventures in the Multiverse

by the dragon from opening in the rulers’ presence or anywhere within their domains.The dragon can take up to three reactions per round but only one per turn. Reactive Rend. After using

", "rollDamageType":"psychic"} psychic damage and move 1 round forward in time. A target moved forward in time vanishes for the duration. When the effect ends, the target reappears in the space it left or

Demogorgon

Monsters Mordenkainen Presents: Monsters of the Multiverse

initiative count 20 of the next round. Illusory Duplicate. Demogorgon creates an illusory duplicate of himself, which appears in his space and lasts until initiative count 20 of the next round. On his turn

;poisonous snakes and other venomous Beasts. If Demogorgon dies, these effects fade over the course of 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Days"} days. Cultists of Demogorgon

Lorthuun

Monsters Out of the Abyss

initiative count 20 on the next round. Walls within 120 feet of the beholder sprout grasping appendages until initiative count 20 on the round after next. Each creature of the beholder's choice that

before, harmless slime might coat a statue, and so on. These effects apply only to natural surfaces and to nonmagical objects that aren't on anyone's person. If the beholder dies, these effects fade over the course of 1d10;{"diceNotation":"1d10","rollType":"roll"} days.

Valin Sarnaster

Monsters Candlekeep Mysteries

as the immortal heir of Savras’s realm. The Canopic Being came into her possession years ago, and an obsession with the dark rituals therein set the oracle on her present course. Valin has

on the next round. Each undead in the lair has advantage on saving throws against effects that turn undead until initiative count 20 on the next round. Until initiative count 20 on the next round

Demogorgon Legacy

Monsters Out of the Abyss

of the next round. On his turn, Demogorgon can move the illusory duplicate a distance equal to his walking speed (no action required). The first time a creature or object interacts physically with

doesn’t need to concentrate on the spells, which end on initiative count 20 of the next round. Regional Effects The region containing Demogorgon’s lair is warped by his magic

Juiblex

Monsters Mordenkainen Presents: Monsters of the Multiverse

after 1 round. Any creature that starts its turn in the burning slime takes 22 (4d10);{"diceNotation":"4d10","rollType":"damage","rollAction":"Slippery Slime","rollDamageType":"fire"} fire damage. Sticky

check. The slime lasts for 1 hour or until it is burned away with fire. If the slime is set on fire, it burns away after 1 round. Any creature that starts its turn in the burning slime takes 22 (4d10

Zariel

Monsters Mordenkainen Presents: Monsters of the Multiverse

. Zariel prefers to create images of intruders’ loved ones being burned alive. Zariel doesn’t need to concentrate on the spells, which end on initiative count 20 of the next round. Each

damage no more than once per round. Smoke. The area within 2 miles of the lair, but no closer than 500 feet, is filled with smoke, which causes the area to be heavily obscured. The smoke can’t be

Froghemoth Elder

Monsters Quests from the Infinite Staircase

reactions per round but only one per turn. Alien Gaze. When a creature the froghemoth can see damages the froghemoth, the froghemoth swivels its eyestalk toward the creature and pierces the creature

. Wildlife encountered near the lair often sport mutations, such as extra limbs or eyes, glowing secretions, or vestigial tentacles. If the froghemoth elder dies, these effects fade over the course of 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Regional Effect Fade Time"} days.Fire, Lightning

Riverine

Monsters Journeys through the Radiant Citadel

20 on the next round. Any creature, other than the riverine, that enters the affected area or starts its turn there takes 7 (2d6);{"diceNotation":"2d6","rollType":"damage","rollAction":"River's

, the flora and fauna return to normal levels, and its river dries out over the course of 1d10;{"diceNotation":"1d10","rollType":"roll","rollAction":"Regional Effect Fade Days"} days. All other effects

Juiblex Legacy

Monsters Out of the Abyss

. If the slime is set on fire, it burns away after 1 round. Any creature that starts its turn in the burning slime takes 22 (4d10);{"diceNotation":"4d10","rollType":"damage","rollAction":"Burning Slime

creature enters the area for the first time on a turn or ends its turn there, that creature must make the same save.If the slime is set on fire, it burns away after 1 round. Any creature that starts its

Adult Crystal Dragon

Monsters Fizban's Treasury of Dragons

dragon until initiative count 20 on the next round. A creature charmed in this way obeys to the best of its ability any command the dragon issues that isn’t directly harmful to the creature. Ice

round. Regional Effects The region surrounding a legendary crystal dragon’s lair is altered by the dragon's magic, creating one or more of the following effects: Clear Skies. The skies above

Ancient Crystal Dragon

Monsters Fizban's Treasury of Dragons

must succeed on a DC 15 Wisdom saving throw or be charmed by the dragon until initiative count 20 on the next round. A creature charmed in this way obeys to the best of its ability any command the

the glow around any creature fades on initiative count 20 on the next round. Regional Effects The region surrounding a legendary crystal dragon’s lair is altered by the dragon's magic

Zargon the Returner

Monsters Quests from the Infinite Staircase

takes its turn immediately after Zargon’s. Only a Wish spell can reverse this transformation and restore the creature to life.Zargon can take up to three reactions per round but only one per turn

patterns that defy the region’s typical climate. If Zargon dies, these effects fade over the course of 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Regional Effect Fade Time"} days.Acid, PoisonCold, Fire; Bludgeoning, Piercing, and Slashing from Nonmagical Attacks

Adult Amethyst Dragon

Monsters Fizban's Treasury of Dragons

the dragon’s telepathy. The creature must succeed on a DC 15 Wisdom saving throw or be charmed by the dragon until initiative count 20 on the next round. A creature charmed in this way obeys to

and the chosen space simultaneously until initiative count 20 on the next round. Whenever it moves or takes an action, it chooses which version of itself is moving or acting. If an effect or attack

Klauth

Monsters Storm King's Thunder

see within 120 feet of it. The sphere spreads around corners, and its area is lightly obscured. It lasts until initiative count 20 on the next round. Each creature that starts its turn in the cloud

of elemental fire into the world to dwell nearby. If the dragon dies, these effects fade over the course of 1d10;{"diceNotation":"1d10","rollType":"roll"} days.FireCold

Ancient Amethyst Dragon

Monsters Fizban's Treasury of Dragons

count 20 on the next round. A creature charmed in this way obeys to the best of its ability any command the dragon issues that isn’t directly harmful to the creature. Imprisoning Force. The

chooses a space it can fit into within the lair. It exists in its own space and the chosen space simultaneously until initiative count 20 on the next round. Whenever it moves or takes an action, it chooses

Hierophant Medusa

Monsters The Book of Many Things

on initiative count 20 on the following round. Sudden Stonework. The medusa creates a wall of stone on a solid surface it can see within the lair. The wall can be up to 60 feet long, 20 feet high

relevant to the medusa’s divine purpose. If the medusa dies, these effects fade over the course of 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Days"} days.PoisonPetrifying Gaze

Adult Deep Dragon

Monsters Fizban's Treasury of Dragons

. Mossy Sludge. The dragon conjures sludge-like moss that briefly covers surfaces in the lair. The ceiling, floor, and walls of the lair become difficult terrain until initiative count 20 on the next round

. If the dragon dies, these effects fade over the course of 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Days"} days.Poison, Psychic

Ancient Sapphire Dragon

Monsters Fizban's Treasury of Dragons

of the dragon’s telepathy. The creature must succeed on a DC 15 Wisdom saving throw or be charmed by the dragon until initiative count 20 on the next round. A creature charmed in this way obeys

numbers. If the dragon dies, the population of giant spider;giant spiders in the region returns to normal levels over the course of 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Days

Ancient Deep Dragon

Monsters Fizban's Treasury of Dragons

conjures sludge-like moss that briefly covers surfaces in the lair. The ceiling, floor, and walls of the lair become difficult terrain until initiative count 20 on the next round. Toxic Spores. The

effects fade over the course of 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Days"} days.Poison, Psychic

Adult Emerald Dragon

Monsters Fizban's Treasury of Dragons

succeed on a DC 15 Wisdom saving throw or be charmed by the dragon until initiative count 20 on the next round. A creature charmed in this way obeys to the best of its ability any command the dragon

saving throws until the start of its next turn. Vanish. The dragon becomes invisible until initiative count 20 on the next round. Regional Effects The region surrounding a legendary emerald dragon

Adult Topaz Dragon

Monsters Fizban's Treasury of Dragons

one creature within range of the dragon’s telepathy. The creature must succeed on a DC 15 Wisdom saving throw or be charmed by the dragon until initiative count 20 on the next round. A creature

initiative count 20 on the next round. While the infusion lasts, creatures in the lair other than the dragon can’t regain hit points. Regional Effects The region surrounding a legendary topaz dragon

Ancient Emerald Dragon

Monsters Fizban's Treasury of Dragons

within range of the dragon’s telepathy. The creature must succeed on a DC 15 Wisdom saving throw or be charmed by the dragon until initiative count 20 on the next round. A creature charmed in

", "rollDamageType":"psychic"} psychic damage and have disadvantage on saving throws until the start of its next turn. Vanish. The dragon becomes invisible until initiative count 20 on the next round

Ancient Topaz Dragon

Monsters Fizban's Treasury of Dragons

the next round. A creature charmed in this way obeys to the best of its ability any command the dragon issues that isn’t directly harmful to the creature. Cancellation. The dragon chooses an

infuses the lair until initiative count 20 on the next round. While the infusion lasts, creatures in the lair other than the dragon can’t regain hit points. Regional Effects The region

Adult Sapphire Dragon

Monsters Fizban's Treasury of Dragons

succeed on a DC 15 Wisdom saving throw or be charmed by the dragon until initiative count 20 on the next round. A creature charmed in this way obeys to the best of its ability any command the dragon

spiders in the region returns to normal levels over the course of 1d10;{"diceNotation":"1d10","rollType":"roll","rollAction":"Days"} days. The enhancement of telepathic abilities ends immediately. The

Merrenoloth Legacy

Monsters Mordenkainen’s Tome of Foes

30 feet until initiative count 20 on the next round. The air within 60 feet of the ship is filled with howling wind. Until initiative count 20 on the next round, that area is difficult terrain, and

vessel with powerful magic that creates one or more of the following effects: The ship doesn't sink even if its hull is breached. The ship always stays on course to the destination the merrenoloth

Demilich Legacy

Monsters Monster Manual (2014)

of it. An antimagic field fills the space of the target, moving with it until initiative count 20 on the next round. The demilich targets any number of creatures it can see within 30 feet of it. No

target can regain hit points until initiative count 20 on the next round. Lair Traits A demilich’s tomb might have any or all of the following effects in place: The first time a non-evil

Beholder Legacy

Monsters Monster Manual (2014)

beholder becomes slimy; that area is difficult terrain until initiative count 20 on the next round. Walls within 120 feet of the beholder sprout grasping appendages until initiative count 20 on the round

natural surfaces and to nonmagical objects that aren’t on anyone’s person. If the beholder dies, these effects fade over the course of 1d10;{"diceNotation":"1d10","rollAction":"Days","rollType":"roll"} days.

Death Tyrant Legacy

Monsters Monster Manual (2014)

the next round. Walls sprout spectral appendages until initiative count 20 on the round after next. Any creature, including one on the Ethereal Plane, that is hostile to the tyrant and starts its

’s lair, roll a d20 for that creature. On a roll of 10 or lower, the creature is subjected to one random eye ray of the tyrant. If the death tyrant dies, these effects fade over the course of 1d10;{"diceNotation":"1d10","rollAction":"Days","rollType":"roll"} days.Poison

Zariel Legacy

Monsters Mordenkainen’s Tome of Foes

create images of intruders’ loved ones being burned alive. Zariel doesn’t need to concentrate on the spells, which end on initiative count 20 of the next round. Each creature that can see

take this damage no more than once per round. The area within 2 miles, but no closer than 500 feet, of the lair is filled with smoke, which causes the area to be heavily obscured. The smoke can&rsquo

Adult Red Dracolich Legacy

Monsters Monster Manual (2014)

lasts until initiative count 20 on the next round. Each creature that starts its turn in the cloud must succeed on a DC 13 Constitution saving throw or be poisoned until the end of its turn. While

of the dracolich's lair form portals to the Elemental Plane of Fire, allowing creatures of elemental fire into the world to dwell nearby. If the dracolich dies, these effects fade over the course of 1d10;{"diceNotation":"1d10","rollType":"roll"} days.Fire, PoisonNecrotic

Adult Red Dragon Legacy

Monsters Basic Rules (2014)

the next round. Each creature that starts its turn in the cloud must succeed on a DC 13 Constitution saving throw or be poisoned until the end of its turn. While poisoned in this way, a creature is

lair form portals to the Elemental Plane of Fire, allowing creatures of elemental fire into the world to dwell nearby. If the dragon dies, these effects fade over the course of 1d10;{"diceNotation":"1d10","rollAction":"Days","rollType":"roll"} days.Fire

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