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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

who forcefully boards their vessels.Lair Actions On initiative count 20 (losing initiative ties) while captaining a vessel, the merrenoloth can take one of the following lair actions; it can’t

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

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

Adult Time Dragon

Monsters Planescape: Adventures in the Multiverse

dragon;ancient or adult time dragon increases by 1 when it’s encountered in its lair. Lair Actions On initiative count 20 (losing initiative ties), the dragon can take one of the following

that space if it’s occupied. Temporal Lag. The dragon slows time for each creature within 60 feet of itself. Until initiative count 20 of the next round, the affected creature can move or take an

Demilich Legacy

Monsters Monster Manual (2014)

. A demilich in its lair has a challenge rating of 20 (24,500 XP). Lair Actions On initiative count 20 (losing initiative ties), the demilich rolls a d20;{"diceNotation":"1d20","rollType":"roll

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

Demogorgon

Monsters Mordenkainen Presents: Monsters of the Multiverse

underwater, in chill and darkened caverns. Lair Actions On initiative count 20 (losing initiative ties), Demogorgon can take one of the following lair actions; he can’t take the same lair action two

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

Lorthuun

Monsters Out of the Abyss

lair has a challenge rating of 14 (11,500 XP). Lair Actions When fighting inside its lair, a beholder can invoke the ambient magic to take lair actions. On initiative count 20 (losing initiative

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

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

cloud in a 20-foot-radius sphere centered on a point the dragon can see within 120 feet of it. The sphere spreads around corners, and its area is lightly obscured. It lasts until initiative count 20 on

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

Beholder Legacy

Monsters Monster Manual (2014)

actions. On initiative count 20 (losing initiative 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 initiative count 20 on the next round. Walls within 120 feet of the beholder sprout grasping appendages until initiative count 20 on the round

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

following effects; Demogorgon can’t use the same effect two rounds in a row: Demogorgon creates an illusory duplicate of himself, which appears in his own space and lasts until initiative count 20

Zariel Legacy

Monsters Mordenkainen’s Tome of Foes

of all kinds crawl over the structure, ensuring that no intruders breach their defenses. Lair Actions. On initiative count 20 (losing initiative ties), Zariel can take a lair action to cause one of

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

Vargouille

Monsters Mordenkainen Presents: Monsters of the Multiverse

hour, as its head takes on fiendish aspects. The curse doesn’t advance while the target is in sunlight or the area of a daylight spell; don’t count that time. When the cursed target’s

’s curse. If the curse is allowed to run its course, an abyssal spirit invades the person’s body, causing a gruesome transformation. Over a period of hours, the victim’s head takes on

Ancient Time Dragon

Monsters Planescape: Adventures in the Multiverse

challenge rating of an ancient or adult time dragon;adult time dragon increases by 1 when it’s encountered in its lair. Lair Actions On initiative count 20 (losing initiative ties), the

in an unoccupied space nearest to that space if it’s occupied. Temporal Lag. The dragon slows time for each creature within 60 feet of itself. Until initiative count 20 of the next round, the

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

15 Strength check, freeing itself or another creature within its reach and ending the restrained condition on a success. Moving 1 foot in the mud costs 2 feet of movement. On initiative count 20 on

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

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 poisoned in this way, a

Riverine

Monsters Journeys through the Radiant Citadel

). Lair Actions On initiative count 20 (losing initiative ties), the riverine can take one of the following lair actions; the riverine can’t take the same lair action two rounds in a row

. The riverine conjures swampy ground that briefly covers the ground in a 20-foot square the riverine can see within 120 feet of itself. That area becomes difficult terrain until initiative count

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

cube within 120 feet of the tyrant is filled with spectral eyes and tentacles. To creatures other than the death tyrant, that area is lightly obscured and difficult terrain until initiative count 20 on

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

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

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

1 minute or until Baphomet creates this effect again. Baphomet chooses a room within the lair that is no larger in any dimension than 100 feet. Until the next initiative count 20, gravity is

Baphomet

Monsters Mordenkainen Presents: Monsters of the Multiverse

on which it stands; it is populated by minotaur;minotaurs, goristro;goristros, and quasit;quasits all of which appear in the Monster Manual. Lair Actions On initiative count 20 (losing initiative

that is no larger in any dimension than 100 feet. The effect ends on the next initiative count 20. Charisma is Baphomet’s spellcasting ability for this spell. Reverse Gravity. Baphomet chooses a

Fraz-Urb'luu Legacy

Monsters Out of the Abyss

(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

’s commands and is destroyed on the next initiative count 20. Fraz-Urb’luu creates a wave of anguish. Each creature he can see within the lair must succeed on a DC 23 Wisdom saving throw or

Fraz-Urb'luu

Monsters Mordenkainen Presents: Monsters of the Multiverse

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

creates a simulacrum of that creature (as if created with the simulacrum spell). This simulacrum obeys Fraz-Urb’luu’s commands and is destroyed on the next initiative count 20. Regional

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

2 feet of movement. On initiative count 20 on the next round, the mud hardens, and the Strength DC to work free increases to 20. Regional Effects The region containing a legendary copper dragon

Orcus Legacy

Monsters Out of the Abyss

woven hair. The city contains wandering undead, many of which are engaged in continuous battles with one another. Lair Actions On initiative count 20 (losing initiative ties), Orcus can take a lair

square that he can see. They last until the next initiative count 20. Each creature in that area when the arms appear must succeed on a DC 23 Strength saving throw or be restrained until the arms

Orcus

Monsters Mordenkainen Presents: Monsters of the Multiverse

wandering Undead, many of which are engaged in continuous battles with one another. Lair Actions On initiative count 20 (losing initiative ties), Orcus can take one of the following lair actions; he can

that he can see. They last until the next initiative count 20. Each creature in that area when the arms appear must succeed on a DC 23 Strength saving throw or be restrained until the arms disappear

Zariel

Monsters Mordenkainen Presents: Monsters of the Multiverse

crawl over the structure, ensuring that no intruders breach their defenses. Lair Actions On initiative count 20 (losing initiative ties), Zariel can take one of the following lair actions; she can

. 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

Ambitious Assassin

Monsters The Book of Many Things

villain is in this lair: Ambitious Assassin. Challenge 6 (2,300 XP) Lair Actions On initiative count 20 (losing initiative ties) while in its lair, the villain can take one of the following lair actions

to poison damage. If the villain dies, these effects fade over the course of 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Days"} days.

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.

Geryon (Summoner Variant) Legacy

Monsters Mordenkainen’s Tome of Foes

took from Baphomet, raging against Asmodeus's betrayal while spitting oaths of vengeance and hatching mad schemes to reclaim his standing from Levistus. Lair Actions. On initiative count 20 (losing

must succeed on a DC 21 Wisdom saving throw or derive no benefit from the rest. If Geryon dies, these effects fade over the course of 1d10;{"diceNotation":"1d10","rollType":"roll"} days.Cold, Fire, PoisonBludgeoning, Piercing, and Slashing from Nonmagical Attacks that aren't Silvered

Veiled Presence

Monsters The Book of Many Things

) Lair Actions On initiative count 20 (losing initiative ties) while in its lair, the villain can take one of the following lair actions; the villain can’t take the same lair action two rounds in a

members of the villain’s organization deal poison damage while within 3 miles of the lair, they ignore the target’s resistance to poison damage. If the villain dies, these effects fade over the course of 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Days"} days.Necrotic, Radiant

Froghemoth Elder

Monsters Quests from the Infinite Staircase

ecosystems that facilitate their growth, such as wrecked spaceships, primordial bogs, and radioactive pools. Lair Actions On initiative count 20 (losing initiative ties), the froghemoth can take one of

. 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

Yeenoghu

Monsters Mordenkainen Presents: Monsters of the Multiverse

initiative count 20 (losing initiative ties), Yeenoghu can take one of the following lair actions; he can’t take the same lair action two rounds in a row: Incite the Pack. Until the next initiative

count 20, all gnoll;gnolls and hyena;hyenas within the lair are enraged, causing them to have advantage on melee weapon attack rolls and causing attack rolls to have advantage against them. Iron Spike

Yeenoghu Legacy

Monsters Out of the Abyss

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

condition. Each gnoll or hyena that Yeenoghu can see can use its reaction to move up to its speed. Until the next initiative count 20, all gnoll;gnolls and hyena;hyenas within the lair are enraged

Demilich (Variant) Legacy

Monsters Monster Manual (2014)

lair has a challenge rating of 23 (50,000 XP). Lair Actions On initiative count 20 (losing initiative ties), the demilich rolls a d20;{"diceNotation":"1d20","rollType":"roll","rollAction":"Take Lair

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

Otherworldly Corrupter

Monsters The Book of Many Things

kill intruders. The villain’s challenge rating increases while the villain is in this lair: Otherworldly Corrupter. Challenge 18 (20,000 XP) Lair Actions On initiative count 20 (losing

damage while within 3 miles of the lair, they ignore the target’s resistance to poison damage. If the villain dies, these effects fade over the course of 1d10;{"diceNotation":"1d10", "rollType

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