course cause were

Control Water

Spells Player’s Handbook

repeat the same effect or choose a different one. Flood. You cause the water level of all standing water in the area to rise by as much as 20 feet. If you choose an area in a large body of water, you

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

Yeenoghu Legacy

Monsters Out of the Abyss

flail attacks. If an attack hits, he can cause it to create an additional effect of his choice or at random (each effect can be used only once per Multiattack): 1. The attack deals an extra 13 (2d12

of civilization on his layer of the Abyss. Lair Actions On initiative count 20 (losing initiative ties), Yeenoghu can take a lair action to cause one of the following effects; he can’t use the

Fraz-Urb'luu Legacy

Monsters Out of the Abyss

of their holy cause, only to eventually reveal his true nature and claim their souls as his own.Fraz-Urb’luu’s Lair Fraz-Urb’luu’s lair lies within the Abyssal lair known as

(62,000 XP) when he’s encountered in his lair. Lair Actions On initiative count 20 (losing initiative ties), Fraz-Urb’luu can take a lair action to cause one of the following effects; he can

Reduced-threat Aboleth

Monsters Tales from the Yawning Portal

, an aboleth can invoke the ambient magic to take lair actions. On initiative count 20 (losing initiative ties), the aboleth takes a lair action to cause one of the following effects: The aboleth

disappears. If the aboleth dies, the first two effects fade over the course of 3d10;{"diceNotation":"3d10","rollType":"roll"} days.

Lorthuun

Monsters Out of the Abyss

ties), the beholder can take one lair action to cause one of the following effects: A 50-foot square area of ground within 120 feet of the beholder becomes slimy; that area is difficult terrain until

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.

Fraz-Urb'luu

Monsters Mordenkainen Presents: Monsters of the Multiverse

to greater and greater atrocities in the name of their cause, only to eventually reveal his true nature and claim their souls as his own.Fraz-Urb’luu’s Lair Fraz-Urb’luu’s

navigation in the area exceedingly difficult. If Fraz-Urb’luu dies, these effects fade over the course of 1d10;{"diceNotation":"1d10","rollType":"roll"} days. Cultists of Fraz-Urb’luu Fraz

Zuggtmoy Legacy

Monsters Out of the Abyss

), 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

that succeeds on this saving throw can’t be affected by this regional effect again for 24 hours. If Zuggtmoy dies, these effects fade over the course of 1d10;{"diceNotation":"1d10","rollType

Baphomet Legacy

Monsters Out of the Abyss

, populated by minotaur;minotaurs, goristro;goristros, and quasit;quasits. Lair Actions On initiative count 20 (losing initiative ties), Baphomet can take a lair action to cause one of the following

be affected by this regional effect again for 24 hours. If Baphomet dies, these effects fade over the course of 1d10;{"diceNotation":"1d10","rollType":"roll"} days. Madness of Baphomet If a

Orcus Legacy

Monsters Out of the Abyss

action to cause one of the following effects; he can’t use the same effect two rounds in a row: Orcus’s voice booms throughout the lair. His utterance causes one creature of his choice to

again for 24 hours. If Orcus dies, these effects fade over the course of 1d10;{"diceNotation":"1d10","rollType":"roll"} days. Madness of Orcus If a creature goes mad in Orcus’s lair or

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

Sarnaster’s Lair Valin can use her lair actions in any area of the tomb. Lair Actions On initiative count 20 (losing initiative ties), Valin takes a lair action to cause one of the following

Yeenoghu

Monsters Mordenkainen Presents: Monsters of the Multiverse

+ 9);{"diceNotation":"2d12+9", "rollType":"damage", "rollAction":"Flail", "rollDamageType":"force"} force damage. If it’s his turn, Yeenoghu can cause the target to suffer one of the following

Yeenoghu dies, these effects fade over the course of 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Days"} days. Cultists of Yeenoghu Yeenoghu grants special abilities to his cultists. His

Demogorgon Legacy

Monsters Out of the Abyss

bulk of this palace extends deep underwater, in chill and darkened caverns. Lair Actions On initiative count 20 (losing initiative ties), Demogorgon can take a lair action to cause one of the

, these effects fade over the course of 1d10;{"diceNotation":"1d10","rollType":"roll"} days. Madness of Demogorgon If a creature goes mad in Demogorgon’s lair or within line of sight of the

Graz'zt Legacy

Monsters Out of the Abyss

initiative count 20 (losing initiative ties), Graz’zt can take a lair action to cause one of the following effects; he can’t use the same effect two rounds in a row: Graz’zt casts

hours. If Graz’zt dies, these effects fade over the course of 1d10;{"diceNotation":"1d10","rollType":"roll"} days. Madness of Graz’zt If a creature goes mad in Graz’zt’s

Belashyrra

Monsters Eberron: Rising from the Last War

initiative ties), Belashyrra can take a lair action to cause one of the following effects; it can’t use the same effect two rounds in a row: An eye opens on a solid surface within 60 feet of

effects fade over the course of 1d10;{"diceNotation":"1d10","rollType":"roll"} days. Madness of Belashyrra If a creature goes mad in Belashyrra’s lair or while it can see the daelkyr, it gains

Hierophant Medusa

Monsters The Book of Many Things

with advantage.Sometimes deeply devout people, usually either Humanoids or medusas, dedicate themselves to a cause and are transformed by a deity or magic into hierophant medusas—beings with

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

Juiblex Legacy

Monsters Out of the Abyss

initiative ties), Juiblex can take a lair action to cause one of the following effects; it can’t use the same effect two rounds in a row: Juiblex slimes a square area of ground it can see within the

regional effect again for 24 hours. If Juiblex dies, these effects fade over the course of 1d10;{"diceNotation":"1d10","rollType":"roll"} days. Madness of Juiblex If a creature goes mad in Juiblex

Klauth

Monsters Storm King's Thunder

lair action to cause one of the following effects; the dragon can’t use the same effect two rounds in a row: Magma erupts from a point on the ground the dragon can see within 120 feet of it

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

Adult Crystal Dragon

Monsters Fizban's Treasury of Dragons

antics sometimes cause avalanches that threaten nearby villages. 5 An adult crystal dragon enjoys shaping the ice and snow near a den of troll;trolls into a labyrinth and watching the trolls try to

the lair returns to normal levels over the course of 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Days"} days. The increased Hit Die recovery ends immediately. The existing abundance of

Merrenoloth Legacy

Monsters Mordenkainen’s Tome of Foes

merrenoloth can invoke its ability to take lair actions. On initiative count 20 (losing initiative ties), the merrenoloth can take one lair action to cause one of the following effects; it can't use the

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

Control Water Legacy

Spells Basic Rules (2014)

spell ends or you choose a different effect. The water then slowly fills in the trench over the course of the next round until the normal water level is restored. Redirect Flow. You cause flowing water

. As an action on your turn, you can repeat the same effect or choose a different one. Flood. You cause the water level of all standing water in the area to rise by as much as 20 feet. If the area

Dominate Monster Legacy

Spells Basic Rules (2014)

telepathic link to issue commands to the creature while you are conscious (no action required), which it does its best to obey. You can specify a simple and general course of action, such as "Attack that

do. During this time, you can also cause the creature to use a reaction, but this requires you to use your own reaction as well. Each time the target takes damage, it makes a new Wisdom saving throw

Dominate Beast Legacy

Spells Basic Rules (2014)

link to issue commands to the creature while you are conscious (no action required), which it does its best to obey. You can specify a simple and general course of action, such as "Attack that creature

. During this time, you can also cause the creature to use a reaction, but this requires you to use your own reaction as well. Each time the target takes damage, it makes a new Wisdom saving throw against

Dominate Person Legacy

Spells Basic Rules (2014)

link to issue commands to the creature while you are conscious (no action required), which it does its best to obey. You can specify a simple and general course of action, such as "Attack that

. During this time you can also cause the creature to use a reaction, but this requires you to use your own reaction as well. Each time the target takes damage, it makes a new Wisdom saving throw

Sloughing Toxin

Equipment

concentrate the toxin in subdermal muscles and eventually cause skin and muscle to slough away. A creature subjected to this poison feels no effect until the end of its next turn. If the poison isn

end of each of its turns, the Poisoned creature must repeat the saving throw, ending the effect on success. If any subsequent saving throw fails by 5 or more, the creature can’t attempt the save again until the poison runs its course.

Dire Corby

Monsters Mordenkainen's Fiendish Folio Volume 1

old pathways become impassable or a flock sustains heavy losses in a particular area, dire corbies will sometimes chart a new migratory course. Depending on their new route, a mob of these creatures

inevitably emerge on the surface, the dire corbies’ voracious appetites cause them to quickly strip their new environment—including any nearby settlements—of life.Thunder

Adult Copper Dragon Legacy

Monsters Basic Rules (2014)

treasure is hidden. Lair Actions On initiative count 20 (losing initiative ties), the dragon takes a lair action to cause one of the following effects: The dragon chooses a point on the ground that

amusing. If the dragon dies, the magic carvings fade over the course of 1d10;{"diceNotation":"1d10","rollType":"roll"} days. The other effects end immediately.Acid

Ancient Red Dragon Legacy

Monsters Basic Rules (2014)

Actions On initiative count 20 (losing initiative ties), the dragon takes a lair action to cause one of the following effects; the dragon can’t use the same effect two rounds in a row: Magma

’s 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

Demilich Legacy

Monsters Monster Manual (2014)

","rollAction":"Take Lair Action"}. On a result of 11 or higher, the demilich takes a lair action to cause one of the following effects. It can’t use the same effect two rounds in a row. The tomb

long as they aren’t used to leave or enter the tomb’s area. If the demilich is destroyed, these effects fade over the course of 10 days.Necrotic, Poison, Psychic; Bludgeoning, Piercing, and Slashing from Nonmagical AttacksBludgeoning, Piercing, and Slashing from Magic Weapons

Adult Red Dracolich Legacy

Monsters Monster Manual (2014)

, telling the grim story of its life, the enemies it has slain, and the nations it has conquered. Lair Actions On initiative count 20 (losing initiative ties), the dracolich takes a lair action to cause

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

Aboleth Legacy

Monsters Basic Rules (2014)

. On initiative count 20 (losing initiative ties), the aboleth takes a lair action to cause one of the following effects: The aboleth casts phantasmal force (no components required) on any number

can sense, speak, and use telepathy from the image’s position as if present at that position. If the image takes any damage, it disappears. If the aboleth dies, the first two effects fade over the course of 3d10;{"diceNotation":"3d10","rollAction":"Days","rollType":"roll"} days.

Adult Red Dragon Legacy

Monsters Basic Rules (2014)

initiative count 20 (losing initiative ties), the dragon takes a lair action to cause one of the following effects; the dragon can’t use the same effect two rounds in a row: Magma erupts from a

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

Adult White Dragon Legacy

Monsters Basic Rules (2014)

breath. Lair Actions On initiative count 20 (losing initiative ties), the dragon takes a lair action to cause one of the following effects; the dragon can’t use the same effect two rounds in

through a wall, it can do so without slowing down. The portion of the wall the dragon moves through is destroyed, however. If the dragon dies, the fog and precipitation fade within 1 day. The ice walls melt over the course of 1d10;{"diceNotation":"1d10","rollType":"roll"} days.Cold

Death Tyrant Legacy

Monsters Monster Manual (2014)

the ambient magic to take lair actions. On initiative count 20 (losing initiative ties), the death tyrant can take one lair action to cause one of the following effects: An area that is a 50-foot

’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

Ancient Copper Dragon Legacy

Monsters Basic Rules (2014)

seekers and distract them from where the real treasure is hidden. Lair Actions On initiative count 20 (losing initiative ties), the dragon takes a lair action to cause one of the following effects

giggling. Even serious matters suddenly seem amusing. If the dragon dies, the magic carvings fade over the course of 1d10;{"diceNotation":"1d10","rollType":"roll"} days. The other effects end immediately.Acid

Ancient White Dragon Legacy

Monsters Basic Rules (2014)

freezing breath. Lair Actions On initiative count 20 (losing initiative ties), the dragon takes a lair action to cause one of the following effects; the dragon can’t use the same effect two rounds in

through a wall, it can do so without slowing down. The portion of the wall the dragon moves through is destroyed, however. If the dragon dies, the fog and precipitation fade within 1 day. The ice walls melt over the course of 1d10;{"diceNotation":"1d10","rollType":"roll"} days.Cold

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