burst before device cube reaction

Elemental Cataclysm

Monsters Monster Manual

). If the cataclysm fails a saving throw, it can choose to succeed instead. Siege Monster. The cataclysm deals double damage to objects and structures.Multiattack. The cataclysm makes two Elemental Burst

attacks. Elemental Burst. Melee or Ranged Attack Roll: +15;{"diceNotation":"1d20+15", "rollType":"to hit", "rollAction":"Elemental Burst"}, reach 30 ft. or range 150 ft. Hit: 25 (5d6 + 8) damage of

Narycrash

Equipment

This backpack-sized device holds a balloon-based parachute. If you fall while wearing this device, you can use your reaction to deploy the parachute. Once deployed, the parachute rapidly inflates

Horizon Puzzle Cube

Magic Items Bigby Presents: Glory of the Giants

Horizon’s Edge, but a device somewhere in the demiplane allows a cube to function in reverse while the cube is fitted into it.

A Horizon puzzle cube is an 8-inch magical cube made of gold, iron, crystal, and copper, and it is worth 5,000 gp to a sage or collector. A functioning puzzle cube can be solved with 30 minutes of

Abjurer Wizard

Monsters Mordenkainen Presents: Monsters of the Multiverse

Multiattack. The abjurer makes three Arcane Burst attacks. Arcane Burst. Melee or Ranged Spell Attack: +8;{"diceNotation":"1d20+8", "rollType":"to hit", "rollAction":"Arcane Burst"} to hit, reach 5

ft. or range 120 ft., one target. Hit: 20 (3d10 + 4);{"diceNotation":"3d10+4", "rollType":"damage", "rollAction":"Arcane Burst", "rollDamageType":"force"} force damage. Force Blast. Each creature in

Iarno “Glasstaff” Albrek

Monsters Phandelver and Below: The Shattered Obelisk

Special Equipment. Glasstaff wields a staff of defense (see appendix B). With the staff in hand, he can use an action to cast the mage armor spell and use his reaction to cast the shield

spell.Multiattack. Glasstaff makes two Shocking Burst attacks. Shocking Burst. Melee or Ranged Spell Attack: +5;{"diceNotation":"1d20+5", "rollType":"spell", "rollAction":"Shocking Burst"} to hit, reach 5 ft. or

Chronolometer

Magic Items Acquisitions Incorporated

While attuned to this device, you have a +1 bonus to Intelligence saving throws. The first time you attune to the chronolometer, you choose one language you don’t know. You subsequently know

that language while attuned to the device. Time Bandit. At the start of your turn, roll a d6 (no action required). On a 1–3, you slow down time, gaining an additional action on your turn and

Wheel of Stars

Magic Items Acquisitions Incorporated

While attuned to this device, you have a +1 bonus to Wisdom saving throws, and you can use an action to cast the dancing lights, guidance, or message cantrips. Portent of the Stars. As a reaction

Coral

Monsters Misplaced Monsters: Volume One

":"bludgeoning"} bludgeoning damage. Tail Thump. Coral slams her tail down, unleashing a burst of magical force toward one creature she can see within 60 feet of her. The target must make a DC 16 Dexterity

target gains 11 (2d8 + 2);{"diceNotation":"2d8+2", "rollType":"roll", "rollAction":"Bolstering Treat"} temporary hit points if it immediately uses its reaction to eat one of the cookies. Any leftover

Eldritch Staff

Magic Items The Wild Beyond the Witchlight

expend the last charge, roll a d20. On a 1, the staff is destroyed in an otherwise harmless burst of eldritch energy. Eldritch Attack. When you hit with a melee attack using the staff, you can expend

up to 3 of its charges. For each charge you expend, the target takes an extra 1d8 lightning damage. Eldritch Escape. If you take damage while holding the staff, you can use your reaction to expend 3

Zuggtmoy Legacy

Monsters Out of the Abyss

":"Pseudopod","rollDamageType":"poison"} poison damage. Infestation Spores (3/Day). Zuggtmoy releases spores that burst out in a cloud that fills a 20-foot-radius sphere centered on her, and it

","rollType":"recharge","rollAction":"Mind Control Spores"}. Zuggtmoy releases spores that burst out in a cloud that fills a 20-foot-radius sphere centered on her, and it lingers for 1 minute. Humanoids and

Y'demi

Monsters Strixhaven: A Curriculum of Chaos

":"Blood Boil"}. Y’demi chooses a point within 150 feet of itself, and a 20-foot radius sphere centered on that point fills with a burst of searing, blood-red mist. Each creature of Y’demi

blood mages almost impossible to ambush.NecroticSanguine Tentacles (1/Day). The blood in the copper basin disappears as tentacles of congealed blood fill a 10-foot cube centered at a point on the ground

Hill Giant Avalancher

Monsters Bigby Presents: Glory of the Giants

Hill Rebuff reaction. The object bearing the rune has AC 15; 20 hit points; and immunity to necrotic, poison, and psychic damage. The object regains all its hit points at the end of every turn, but

failed save, the target has the restrained condition until the start of the giant’s next turn, and the stones erupt in a burst of thunderous energy that deals 14 (4d6);{"diceNotation":"4d6

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

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

Dandylion

Monsters Misplaced Monsters: Volume One

a bonus action. Rejuvenating Seedpods (2/Day). The dandylion releases a burst of seedpods from its tail, filling a 10-foot-radius sphere centered on itself. Each creature of the dandylion’s

reaction must succeed on a DC 15 Wisdom saving throw or have the frightened condition until the end of the dandylion’s next turn. Created by Jones D.-D. Dandylions are herbivorous farmers who

Archon of Falling Stars

Monsters Mythic Odysseys of Theros

makes a radiant spear attack, and then its mount can use its reaction to make a melee weapon attack. Return to Nyx (Costs 3 Actions). The archon causes a corpse it can see within 30 feet of it to burst

with a burst of radiance. Each creature of the archon’s choice within 30 feet of it must succeed on a DC 16 Constitution saving throw, or the creature takes 13 (3d8);{"diceNotation":"3d8

Fomorian Warlock of the Dark

Monsters Bigby Presents: Glory of the Giants

action and Poisoning Rebuke reaction. The object bearing the blood rune has AC 15; 30 hit points; and immunity to necrotic, poison, and psychic damage. The object regains all its hit points at the end

if it tries to cast a spell, it must first succeed on a DC 16 Intelligence check or the spell fails and is wasted. Eldritch Burst. Magical energy explodes in a 20-foot-radius sphere centered on a

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

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

Mighty Servant of Leuk-o

Magic Items Tasha’s Cauldron of Everything

conjecture than fact, often referring to otherworldly beings, the mysterious Barrier Peaks in Oerth, and the supposedly related device known as the Machine of Lum the Mad. The best details on the device

’s origins and operation can be found in the Mind of Metal, a tome of artificer’s secrets that connects the device to the traditions of the lost Olman people, and which was written by Lum the

Zuggtmoy

Monsters Mordenkainen Presents: Monsters of the Multiverse

. One creature charmed by Zuggtmoy that she can see must use its reaction, if available, to move up to its speed as she directs or to make one weapon attack against a target that she designates.The Demon

, LightningInfestation Spores (3/Day). Zuggtmoy releases spores that burst out in a cloud that fills a 20-foot-radius sphere centered on her, and it lingers for 1 minute. Any creature in the cloud when it

Yeenoghu Legacy

Monsters Out of the Abyss

same effect two rounds in a row. Yeenoghu causes an iron spike—5 feet tall and 1 inch in diameter—to burst from the ground at a point he can see within 100 feet of him. Any creature in

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

Yeenoghu

Monsters Mordenkainen Presents: Monsters of the Multiverse

. Yeenoghu causes an iron spike—5 feet tall and 1 inch in diameter—to burst from the ground at a point he can see within 100 feet of him. Any creature in the space where the spike emerges

or hyena that Yeenoghu can see can use its reaction to move up to its speed. Regional Effects The region containing Yeenoghu’s lair is warped by his magic, creating one or more of the

Narycrash

Compendium - Sources->Dungeons & Dragons->Dragonlance: Shadow of the Dragon Queen

Narycrash This backpack-sized device holds a balloon-based parachute. If you fall while wearing this device, you can use your reaction to deploy the parachute. Once deployed, the parachute rapidly

Adult Deep Dragon Legacy

Monsters Fizban's Treasury of Dragons

creature within 30 feet of it that it can see. The target must succeed on a DC 16 Wisdom saving throw or use its reaction to make a melee weapon attack against a random creature within reach. If no

creatures are within reach, or the target can’t take a reaction, it takes 5 (1d10);{"diceNotation":"1d10", "rollType":"damage", "rollAction":"Commanding Spores", "rollDamageType":"psychic"} psychic

Magical Gadgets

Compendium - Sources->Dungeons & Dragons->Baldur's Gate: Descent into Avernus

driver can activate this magical device as a bonus action, causing the vehicle to expel a 30-foot cube of opaque smoke directly in front of it or behind it. The cloud is stationary and lasts for 1

. This device needs 24 hours to recharge before it can be used again. Teleporter The vehicle’s driver can activate this magical device as a bonus action, causing the vehicle to teleport to an

Horizon's Edge Magic

Compendium - Sources->Dungeons & Dragons->Bigby Presents: Glory of the Giants

creature uses an action to change the puzzle’s configuration. Puzzle cubes don’t function while on Horizon’s Edge, but a device somewhere in the demiplane allows a cube to function in reverse while the

scattered across the Material and Inner Planes, and these cubes are among the few ways to enter Horizon’s Edge. A Horizon puzzle cube is an 8-inch magical cube made of gold, iron, crystal, and copper

Invigorated March

Compendium - Sources->Dungeons & Dragons->Flee, Mortals! Rule Primer

Invigorated March 3rd-Order Metamorphosis Power Manifestation Time: 1 bonus action Range: 30 feet Duration: Instantaneous You emit a burst of mentally invigorating energy into the mind of a

creature you can see within range. That creature can use their reaction, if available, to move up to their speed without provoking opportunity attacks. Increased Order. When you manifest this power, you can increase its order by 1 or more. For each increase of 1, you target one additional creature.

Surprise

Compendium - Sources->Dungeons & Dragons->Basic Rules (2014)

Surprise A band of adventurers sneaks up on a bandit camp, springing from the trees to attack them. A gelatinous cube glides down a dungeon passage, unnoticed by the adventurers until the cube

doesn't notice a threat is surprised at the start of the encounter. If you're surprised, you can't move or take an action on your first turn of the combat, and you can't take a reaction until that turn ends. A member of a group can be surprised even if the other members aren't.

Surprise

Compendium - Sources->Dungeons & Dragons->Player's Handbook (2014)

Surprise A band of adventurers sneaks up on a bandit camp, springing from the trees to attack them. A gelatinous cube glides down a dungeon passage, unnoticed by the adventurers until the cube

doesn’t notice a threat is surprised at the start of the encounter. If you’re surprised, you can’t move or take an action on your first turn of the combat, and you can’t take a reaction until that turn ends. A member of a group can be surprised even if the other members aren’t.

Ancient Deep Dragon Legacy

Monsters Fizban's Treasury of Dragons

around a creature within 30 feet of it that it can see. The target must succeed on a DC 19 Wisdom saving throw or use its reaction to make a melee weapon attack against a random creature within reach. If

no creatures are within reach, or the target can’t take a reaction, it takes 11 (2d10);{"diceNotation":"2d10", "rollType":"damage", "rollAction":"Commanding Spores", "rollDamageType":"psychic

Chronolometer

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

Chronolometer Wondrous item, very rare (requires attunement) While attuned to this device, you have a +1 bonus to Intelligence saving throws. The first time you attune to the chronolometer, you

choose one language you don’t know. You subsequently know that language while attuned to the device. Time Bandit. At the start of your turn, roll a d6 (no action required). On a 1–3, you slow down time

Rogue

Compendium - Sources->Dungeons & Dragons->Sage Advice Compendium

the fighter’s turn, and if the attack qualifies, it can use Sneak Attack. Both of those options rely on the use of your reaction, so you could do only one of them in a round. Because you get only one

reaction per round, you’re unlikely to use Sneak Attack more than twice in a round: once with your action and once with your reaction. For Sneak Attack, what if another enemy of your target was 10

Air Envelopes

Compendium - Sources->Dungeons & Dragons->Spelljammer: Adventures in Space->Astral Adventurer’s Guide

Envelope and Gravity Plane Air Envelopes of Creatures The envelope of breathable air that forms around a creature takes the shape of a cube centered on that creature. The creature’s size determines the

cube’s dimensions, as shown in the Air Envelopes of Creatures table. Air Envelopes of Creatures Creature’s Size Air Envelope Tiny 2½-foot cube Small or Medium 5-foot cube Large 10-foot cube Huge 15

Inside the Temple

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

divination magic around it. If asked about it, Nim tells Valetta that it built this device to find the errant nimblewright and tried to seek it out, only to discover that Nim couldn’t leave the temple grounds

device comes within 500 feet of a nimblewright other than Nim, the umbrella begins to spin, whir, and click. The spinning, whirring, and clicking accelerates as the distance to the target lessens

D&D Beyond

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