being before descent cube rounds

Death Tyrant Legacy

Monsters Monster Manual (2014)

the target is a Huge or larger object or creation of magical force, this ray disintegrates a 10-foot cube of it. Death Ray. The targeted creature must succeed on a DC 17 Dexterity saving throw or

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 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

);{"diceNotation":"1d6","rollType":"damage","rollAction":"Thicket","rollDamageType":"piercing"} piercing damage from thorns.Each 10-foot-cube of thickets has AC 5, 30 hit points, resistance to bludgeoning and

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

);{"diceNotation":"1d6","rollType":"damage","rollAction":"Thickets","rollDamageType":"piercing"} piercing damage from thorns.Each 10-foot-cube of thickets has AC 5, 30 hit points, resistance to bludgeoning

Beholder Legacy

Monsters Monster Manual (2014)

object or creation of magical force, this ray disintegrates a 10-foot cube of it. Death Ray. The targeted creature must succeed on a DC 16 Dexterity saving throw or take 55 (10d10);{"diceNotation

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

Geryon Legacy

Monsters Mordenkainen’s Tome of Foes

initiative count 20 (losing initiative ties), Geryon can take a lair action to cause one of the following effects; he can't use the same effect two rounds in a row: Geryon causes a blast of cold to burst

from the ground at a point he can see within 120 feet of him. The cold fills a cube, 10 feet on each side, centered on that point. Each creature in that area must succeed on a DC 21 Constitution saving

Ambitious Assassin

Monsters The Book of Many Things

, filling a 10-foot cube within 5 feet of the assassin. Each creature of the assassin’s choice in that area takes 9 (2d8);{"diceNotation":"2d8", "rollType":"damage", "rollAction":"Vanishing Escape

; the villain can’t take the same lair action two rounds in a row: Distraction. A shrill sound fills the lair. Creatures that can hear it must succeed on a DC 15 Constitution saving throw or

Geryon (Summoner Variant) Legacy

Monsters Mordenkainen’s Tome of Foes

initiative ties), Geryon can take a lair action to cause one of the following effects; he can't use the same effect two rounds in a row: Geryon causes a blast of cold to burst from the ground at a point

he can see within 120 feet of him. The cold fills a cube, 10 feet on each side, centered on that point. Each creature in that area must succeed on a DC 21 Constitution saving throw or take 28 (8d6

Arasta

Monsters Mythic Odysseys of Theros

":"recharge","rollAction":"Web of Hair"}. Arasta unleashes her hair in the form of webbing that fills a 30-foot cube next to her. The web is difficult terrain, its area is lightly obscured, and it lasts for 1

5-foot cube of the web is destroyed if it takes at least 20 fire damage from a spell or other magical source on a single turn.Arasta can take 3 legendary actions, choosing from the options below

Geryon

Monsters Mordenkainen Presents: Monsters of the Multiverse

following lair actions; he can’t take the same lair action two rounds in a row: Banish. Geryon casts the banishment spell. Chill Blast. Geryon causes a blast of cold to burst from the ground

at a point he can see within 120 feet of him. The cold fills a cube, 10 feet on each side, centered on that point. Each creature in that area must succeed on a DC 21 Constitution saving throw or take

Geryon (Variant)

Monsters Mordenkainen Presents: Monsters of the Multiverse

one of the following lair actions; he can’t take the same lair action two rounds in a row: Banish. Geryon casts the banishment spell. Chill Blast. Geryon causes a blast of cold to burst from the

ground at a point he can see within 120 feet of him. The cold fills a cube, 10 feet on each side, centered on that point. Each creature in that area must succeed on a DC 21 Constitution saving throw

Claugiyliamatar

Monsters Storm King's Thunder

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

contact with the thickets or take 3 (1d6);{"diceNotation":"1d6","rollType":"damage","rollAction":"Thorns","rollDamageType":"piercing"} piercing damage from thorns.Each 10-foot-cube of thickets has AC 5

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

thorns.Each 10-foot-cube of thickets has AC 5, 30 hit points, resistance to bludgeoning and piercing damage, vulnerability to fire damage, and immunity to psychic and thunder damage. Within 1 mile of its

3. False Entrance

Compendium - Sources->Dungeons & Dragons->Tomb of Annihilation

relief carvings of grinning skulls. Four lines engraved at the center of the slab cross one another to form a star, with both ends of each line marking the location of a cube-shaped cavity cut into the

its turns. After 10 rounds, the gas valves close and the stone block rises back into the ceiling. Any puzzle cubes still in their cavities are pushed out, and the trap resets. Any character searching

Approaching the Canyon

Compendium - Sources->Dungeons & Dragons->Storm King's Thunder

the “Airship of a Cult” section in chapter 4 for the balloon’s statistics). If it successfully brings down the airship, the roc spends a few rounds picking through the wreckage in search of food before

option of climbing down into the jagged rift at a point of their choosing. The sounds of their descent are muffled by the wind.

T3. Steam and Steel

Compendium - Sources->Dungeons & Dragons->Waterdeep: Dragon Heist

Order of Armorers, Locksmiths, and Finesmiths. Embric tends the forge and is an expert weaponsmith. He claims descent from the efreet of Calimshan and is prone to extreme mood swings. He has the

control the flow and shape of water in a 5-foot cube, or cause the water to freeze for up to 1 hour. He has a swimming speed of 30 feet, and he can breathe air and water. He has resistance to acid damage

Adult Deep Dragon Legacy

Monsters Fizban's Treasury of Dragons

initiative count 20 (losing initiative ties), the dragon can take one of the following lair actions; the dragon can’t take the same lair action two rounds in a row: Deep Torpor. The dragon casts the

. Toxic Spores. The dragon fills a 20-foot cube it can see within 120 feet of itself with toxic spores. Each creature in that area must succeed on a DC 15 Constitution saving throw or take 14 (4d6

Ancient Deep Dragon Legacy

Monsters Fizban's Treasury of Dragons

initiative ties), the dragon can take one of the following lair actions; the dragon can’t take the same lair action two rounds in a row: Deep Torpor. The dragon casts the slow spell, requiring no

dragon fills a 20-foot cube it can see within 120 feet of itself with toxic spores. Each creature in that area must succeed on a DC 15 Constitution saving throw or take 14 (4d6);{"diceNotation":"4d6

16. Papazotl's Shrine

Compendium - Sources->Dungeons & Dragons->Tomb of Annihilation

crocodile that nests to the rear of the shrine. If the characters attack the crocodiles, their mother joins the fray 2 rounds later. 16B. Mosaic Floor Moss clings to the stonework throughout this hall. The

be dispelled with a dispel magic spell. The crawlway, which is 2 feet wide and 3 feet high, leads to area 16D. Puzzle Cube. If a character searches the pedestal, they discover the outline of a stone

17. The Boiling Bubble

Compendium - Sources->Dungeons & Dragons->Tales from the Yawning Portal->a4

rounds. After 30 feet the corridor gives way to an oval-shaped, domed area enclosed by the protective skin. Here lives the guardian of the treasure, a Huge giant crab that has the following changes

), goggles of night, and a stone of good luck (luckstone). Development. A character who grabs Wave while the protective skin is collapsing can save the lives of those nearby by using the trident as a cube

A Deep Dragon's Lair

Compendium - Sources->Dungeons & Dragons->Fizban's Treasury of Dragons

it’s encountered in its lair. Lair Actions On initiative count 20 (losing initiative ties), the dragon can take one of the following lair actions; the dragon can’t take the same lair action two rounds in

, and walls of the lair become difficult terrain until initiative count 20 on the next round. Toxic Spores. The dragon fills a 20-foot cube it can see within 120 feet of itself with toxic spores. Each

Mistshore: Autumn

Compendium - Sources->Dungeons & Dragons->Waterdeep: Dragon Heist

Belchy, sank in Deepwater Harbor almost a century ago. Lantanese gnomes working for Jarlaxle have managed to repair the construct. Two rounds after the characters corner Fel’rekt and Krebbyg, Big Belchy

of steam onto the docks in a 30-foot cube, then begins to move away at a swimming speed of 20 feet. Any creature in the cloud of steam must make a DC 14 Dexterity saving throw, taking 22 (4d10) fire

Rakdos Carnival

Compendium - Sources->Dungeons & Dragons->Guildmasters' Guide to Ravnica

action, causing one of the following effects; the carnival can’t use the same effect two rounds in a row: Fire erupts from the ground at up to four points of the DM’s choice in the carnival. The fire

, spiked chains, or other implements of agony appear for a moment to menace 1d6 random creatures in a 20-foot cube. Each target must succeed on a DC 15 Dexterity saving throw or take 9 (2d8) force

7. Gray Ghost Garden

Compendium - Sources->Dungeons & Dragons->Out of the Abyss

action to open or close a valve on the tank, releasing a cloud of pungent fertilizer that fills a 30-foot cube. The cloud grows 10 feet per side each round the valve remains open. The cloud has the same

effect as a stinking cloud spell (save DC 12), but the effect ends 1d4 + 1 rounds after the valve is closed or the tank runs out of fertilizer. The tank contains enough fertilizer to spray for 10 rounds

Eastmyr

Compendium - Sources->Dungeons & Dragons->Out of the Abyss

up the social ladder or trying to slow the downward descent of shifting fortunes. Though this area suffered relatively little damage during Demogorgon’s rampage, its population has swelled with

patrol (see “Duthcloim” for more information), which arrives in 1d6 rounds. Any cultists that escape flee to a crumbling tenement a block away that the cult has converted into a shrine to Demogorgon

Fhenimore and Whymsee

Compendium - Sources->Dungeons & Dragons->Locathah Rising

play out very diﬀerently. In this instance, Gar’s plans unfold as shown in the “Fighting Fhenimore and Whymsee” sidebar. FIGHTING FHENIMORE AND WHYMSEE Round 1. Gar activates the cube of force

slay and consume the kraken priests. Rounds 3 and 4. The kraken priests are consumed by the swarms while Gar uses Umberlee’s Wake on the young kraken (who fails its saving throw) before charging to

Sample Haunted Traps

Compendium - Sources->Dungeons & Dragons->Van Richten’s Guide to Ravenloft

trap are freed from its effects and float to the ground safely. Faceless Malice Haunt Bonus +2 This haunted trap affects a 15-foot-cube in front of an ornate mirror hanging on a wall. When a visible

vision ends, all creatures in the area that saw the illusion must succeed on a DC 10 Wisdom saving throw or become frightened of the area for the next 1d4 rounds. Frightened creatures must take the

7. The Sepulcher of Tloques-Popolocas

Compendium - Sources->Dungeons & Dragons->Tales from the Yawning Portal->a3

about. This part of the regeneration process requires 2 rounds, during which time the corpse has AC 12 and 27 hit points. (If they have not been removed, the corpse benefits from the bracers of defense

and the ring of protection he is wearing; see “Treasure.”) If either the mask or the pendant is forced back upon him before the 2 rounds elapse, he returns to death. If not, he then sits for 2 more

Arasta of the Endless Web

Compendium - Sources->Dungeons & Dragons->Mythic Odysseys of Theros

(losing initiative ties), Arasta can take a lair action to cause one of the following effects. She can’t use the same effect two rounds in a row. Arasta learns about any creature touching her webs. Each

: +14 to hit, reach 5 ft., one target. Hit: 17 (3d6 + 7) slashing damage. Web of Hair (Recharge 4–6). Arasta unleashes her hair in the form of webbing that fills a 30-foot cube next to her. The web is

Death Tyrant

Compendium - Sources->Dungeons & Dragons->Monster Manual (2014)

disintegrated without a saving throw. If the target is a Huge or larger object or creation of magical force, this ray disintegrates a 10-foot cube of it. Death Ray. The targeted creature must succeed on a

(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

Geryon

Compendium - Sources->Dungeons & Dragons->Monsters of the Multiverse

initiative count 20 (losing initiative ties), Geryon can take one of the following lair actions; he can’t take the same lair action two rounds in a row: Banish. Geryon casts the banishment spell. Chill

Blast. Geryon causes a blast of cold to burst from the ground at a point he can see within 120 feet of him. The cold fills a cube, 10 feet on each side, centered on that point. Each creature in that

Geryon

Compendium - Sources->Dungeons & Dragons->Mordenkainen's Tome of Foes

20 (losing initiative ties), Geryon can take a lair action to cause one of the following effects; he can’t use the same effect two rounds in a row: Geryon causes a blast of cold to burst from the

ground at a point he can see within 120 feet of him. The cold fills a cube, 10 feet on each side, centered on that point. Each creature in that area must succeed on a DC 21 Constitution saving throw or

Beholder

Compendium - Sources->Dungeons & Dragons->Monster Manual (2014)

creation of magical force, this ray disintegrates a 10-foot cube of it. Death Ray. The targeted creature must succeed on a DC 16 Dexterity saving throw or take 55 (10d10) necrotic damage. The target

have all been used, and it can’t use the same effect two 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

Super-Secret Basement

Compendium - Sources->Dungeons & Dragons->Acquisitions Incorporated

other side of the room, and attacks in the second round of combat. Unless they are attacked first, the duodrones ignore the characters to start. But if combat with the swarms goes to three rounds, the

creature resembling a cube with wings. All of them work to place parts into two fifteen-foot-wide, floor-to-ceiling, metallic walls at the room’s center. Those walls are the source of the hum, and each glows

Maze of Mists

Compendium - Sources->Dungeons & Dragons->Quests from the Infinite Staircase

appendix B) and his descent into evil Answered Incorrectly. If the characters answer the riddle incorrectly, Senenura attacks and fights ferociously to the death. Trough. The circular opening at the base of

(losing initiative ties), and the damage on subsequent rounds is reduced by 1d10. When the number of damage dice reaches 0, the blade stops. Secret Door. A secret door atop this room’s 30-foot-high

Magical Phenomena

Compendium - Sources->Dungeons & Dragons->Tasha’s Cauldron of Everything

actions. On initiative count 20 (losing all ties), the mimic colony takes a lair action, causing one of the following effects; it can’t use the same effect two rounds in a row: The mimic colony

surfaces in the environment and launch caustic spittle. The mimic colony chooses a cube of nonmagical, inanimate material in physical contact with it. The cube can be up to 15 feet on a side. The colony

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