barriers blocks diffusing cause rounds

Doppelganger Legacy

Monsters Basic Rules (2014)

magically reads the surface thoughts of one creature within 60 feet of it. The effect can penetrate barriers, but 3 feet of wood or dirt, 2 feet of stone, 2 inches of metal, or a thin sheet of lead

blocks it. While the target is in range, the doppelganger can continue reading its thoughts, as long as the doppelganger's concentration isn't broken (as if concentrating on a spell). While reading the

Faerie Borrower

Monsters Monstrous Compendium Vol. 4: Eldraine Creatures

are tiny thieves who steal whatever they can lay their hands on to cause confusion and consternation. A faerie borrower stands less than six inches tall, with blue or blue-gray skin and wings resembling

’s faeries, the faeries treat them like distant (and somewhat embarrassing) cousins. Ouphes can be represented with the stat blocks for Pixie;pixies or Sprite;sprites.

Faerie Pest

Monsters Monstrous Compendium Vol. 4: Eldraine Creatures

have the frightened condition for 1 minute. A frightened creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.Faerie pests love to cause

moss than most mortals. While ouphes are related to Eldraine’s faeries, the faeries treat them like distant (and somewhat embarrassing) cousins. Ouphes can be represented with the stat blocks for Pixie;pixies or Sprite;sprites. Mischievous Stealth. The faerie takes the Hide action.

Diderius

Monsters Tyranny of Dragons

(Costs 2 Actions). Diderius magically unleashes negative energy. Creatures within 60 feet of him, including ones behind barriers and around corners, can’t regain hit points until the end of his next

encountered in its lair has a challenge rating of 16 (15,000 XP). Lair Actions On initiative count 20 (losing initiative ties), the mummy lord takes a lair action to cause one of the following effects

Mummy Lord Legacy

Monsters Basic Rules (2014)

On initiative count 20 (losing initiative ties), the mummy lord takes a lair action to cause one of the following effects; the mummy lord can’t use the same effect two rounds in a row. Each

, including ones behind barriers and around corners, can't regain hit points until the end of the mummy lord's next turn. Whirlwind of Sand (Costs 2 Actions). The mummy lord magically transforms into a

Adult Green 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: Grasping roots and vines

to 60 feet long, 10 feet high, and 5 feet thick, and it blocks line of sight. When the wall appears, each creature in its area must make a DC 15 Dexterity saving throw. A creature that fails the save

Ancient Green 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: Grasping roots and

is up to 60 feet long, 10 feet high, and 5 feet thick, and it blocks line of sight. When the wall appears, each creature in its area must make a DC 15 Dexterity saving throw. A creature that fails

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

same effect two rounds in a row: The ship regains 22 (4d10);{"diceNotation":"4d10","rollType":"healing","rollAction":"Lair Action"} hit points. A strong wind propels the ship, increasing its speed by

War Oil

Equipment

point, such as the ground or a wall, and on an attack roll against AC 10, cause the War Oil to spill out of the ammunition, creating a circular patch of the viscous substance with a 10-foot radius. War

an open flame or some other source of Fire damage, the oil ignites. The ignited oil burns for two rounds, dealing 2d4 Fire damage to any creature or object who comes in contact with it, and an

Githzerai Anarch Legacy

Monsters Mordenkainen’s Tome of Foes

action to cause one of the following effects; the anarch can’t use the same effect two rounds in a row: The anarch casts the lightning bolt spell (at 5th level), but the anarch can change the

":"roll"} rounds. All formed substance becomes a chaotic churn of energy and matter, unraveling into unformed substance that dissipates 1d6;{"diceNotation":"1d6","rollType":"roll"} rounds later. The

Valin Sarnaster

Monsters Candlekeep Mysteries

energy. Creatures within 60 feet of Valin, including ones behind barriers and around corners, can’t regain hit points until the end of Valin’s next turn. Whirlwind of Sand (Costs 2 Actions

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

Detect Thoughts Legacy

Spells Basic Rules (2014)

creatures you can’t see. When you cast the spell or as your action during the duration, you can search for thoughts within 30 feet of you. The spell can penetrate barriers, but 2 feet of rock, 2

inches of any metal other than lead, or a thin sheet of lead blocks you. You can’t detect a creature with an Intelligence of 3 or lower or one that doesn’t speak any language. Once you

Gorka Tharn

Monsters Waterdeep: Dungeon of the Mad Mage

takes a lair action to cause one of the following effects; the mummy lord can’t use the same effect two rounds in a row. Each undead creature in the lair can pinpoint the location of each

Negative Energy (Costs 2 Actions). The mummy lord magically unleashes negative energy. Creatures within 60 feet of the mummy lord, including ones behind barriers and around corners, can't regain hit

Adult Black Dragon Legacy

Monsters Basic Rules (2014)

infest the lair, which is filled with the stench of death and decay. 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 a row: Pools of water that the dragon can see within 120 feet of it surge outward in a grasping tide. Any creature on the ground within 20

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

Adult Blue Dragon Legacy

Monsters Basic Rules (2014)

wealth of the dead intruders. 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 a row: Part of the ceiling collapses above one creature that the dragon can see within 120 feet of it. The creature must succeed on a DC 15 Dexterity saving throw or take 10

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

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

Ancient Gold Dragon Legacy

Monsters Basic Rules (2014)

ancient ruins. 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

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

one of the following effects; the dracolich can’t use the same effect two rounds in a row: Magma erupts from a point on the ground the dracolich can see within 120 feet of it, creating a 20

Adult Gold Dragon Legacy

Monsters Basic Rules (2014)

ruins. 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 a row

Lich Legacy

Monsters Basic Rules (2014)

ties), the lich can take a lair action to cause one of the following magical effects; the lich can’t use the same effect two rounds in a row: The lich rolls a d8;{"diceNotation":"1d8","rollType

Ancient Black Dragon Legacy

Monsters Basic Rules (2014)

the lair, which is filled with the stench of death and decay. 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 a row: Pools of water that the dragon can see within 120 feet of it surge outward in a grasping tide. Any creature on the ground within 20 feet

Ancient Blue Dragon Legacy

Monsters Basic Rules (2014)

the wealth of the dead intruders. 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 a row: Part of the ceiling collapses above one creature that the dragon can see within 120 feet of it. The creature must succeed on a DC 15 Dexterity saving throw or take 10

Claugiyliamatar

Monsters Storm King's Thunder

their lairs with vegetation. 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 a row: Grasping roots and vines erupt in a 20-foot radius centered on a point on the ground that the dragon can see within 120 feet of it. That area becomes difficult terrain, and

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

rounds in a row. Regional Effects A region containing a beholder’s lair is warped by the creature’s unnatural presence, which creates one or more of the following effects: Creatures

Claugiyliamatar (possessed)

Monsters Divine Contention

(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: Grasping roots and vines erupt in a 20

, 10 feet high, and 5 feet thick, and it blocks line of sight. When the wall appears, each creature in its area must make a DC 15 Dexterity saving throw. A creature that fails the save takes 18 (4d8

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

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

. The eye then closes and disappears. The death tyrant can’t repeat an effect until all three have been used, and it can’t use the same effect on consecutive rounds. Regional Effects A

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

Scion of Stronmaus

Monsters Bigby Presents: Glory of the Giants

cloud up to 30 feet and cause one of the following effects in a 30-foot-radius, 120-foot-high cylinder directly below it; the scion can’t choose the same effect two rounds in a row: Acid Rain

’s not particularly interested in Humanoids or other little creatures—either in conversing with them or in protecting them from harm it might cause. If the scion is threatened, it unleashes

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

Imix

Monsters Princes of the Apocalypse

(such as the Weeping Colossus in chapter 5). On initiative count 20 (losing initiative ties), Imix uses his lair action to cause one of the following effects: Any fires in the lair flare up

":"Wildfire","rollDamageType":"fire"} fire damage. A wildfire continues to threaten the characters for 1d10;{"diceNotation":"1d10","rollType":"roll","rollAction":"Wildfire Rounds"} rounds or until they

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

The Gardener

Monsters Quests from the Infinite Staircase

rounds in a row: Plant Walk. The Gardener moves up to their speed into the space of a Medium or larger plant within the lair, then teleports to an unoccupied space within 5 feet of any other Medium

blocks line of sight. When the wall appears, each creature in its area must succeed on a DC 15 Dexterity saving throw or have the grappled condition (escape DC 15). A creature must make this saving throw

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