before been device cause reaction

Find Familiar

Spells Player’s Handbook

touch, your familiar can deliver the touch. Your familiar must be within 100 feet of you, and it must take a Reaction to deliver the touch when you cast the spell. Combat. The familiar is an ally to

forever. As a Magic action while it is temporarily dismissed, you can cause it to reappear in an unoccupied space within 30 feet of you. Whenever the familiar drops to 0 Hit Points or disappears into

Shield Master

Feats Player’s Handbook

Strength saving throw (DC 8 plus your Strength modifier and Proficiency Bonus). On a failed save, you either push the target 5 feet from you or cause it to have the Prone condition (your choice). You can

use this benefit only once on each of your turns. Interpose Shield. If you’re subjected to an effect that allows you to make a Dexterity saving throw to take only half damage, you can take a Reaction to take no damage if you succeed on the saving throw and are holding a Shield.

Quarterstaff of the Acrobat

Magic Items Dungeon Master’s Guide

You have a +2 bonus to attack rolls and damage rolls made with this magic weapon. While holding this weapon, you can cause it to emit green Dim Light out to 10 feet, either as a Bonus Action or

an attack while holding the weapon, you can take a Reaction to twirl the weapon around you, gaining a +5 bonus to your Armor Class against the triggering attack, potentially causing the attack to miss

Wall of Stone

Spells Player’s Handbook

success, it can use its Reaction to move up to its Speed so that it is no longer enclosed by the wall. The wall can have any shape you desire, though it can’t occupy the same space as a

a panel to 0 Hit Points destroys it and might cause connected panels to collapse at the DM’s discretion. If you maintain your Concentration on this spell for its full duration, the wall becomes permanent and can’t be dispelled. Otherwise, the wall disappears when the spell ends.

Dazzling Weapon

Magic Items Eberron: Forge of the Artificer

This magic weapon grants a +1 bonus to attack and damage rolls made with it. While holding it, you can take a Bonus Action to cause it to shed Bright Light in a 30-foot radius and Dim Light for an

additional 30 feet. You can extinguish the light as a Bonus Action. The weapon has 4 charges. You can take a Reaction immediately after being hit by an attack roll to expend 1 of the weapon’s

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

Robot Controller

Equipment

the device gives the device 3 charges. As an action while holding this device, you can expend 1 of its charges to cause one of the following effects: Control. One Construct of your choice within 60

This small handheld device features a glass pane with a glowing display that responds to your touch. The controller is powered by an energy cell stored in the device. Placing a full energy cell in

Ythryn Mythallar

Magic Items Icewind Dale: Rime of the Frostmaiden

of existence as the Ythryn mythallar, you can use an action to cause it to fly in any direction you choose at a speed of 30 feet. All matter within 500 feet of the device moves with it. The Ythryn

hold. The largest mythallars are 150 feet in diameter. The Ythryn mythallar is a relatively small device—a mere 50 feet in diameter. To attune to this mythallar, a creature must finish a short

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

Dominate Monster Legacy

Spells Basic Rules (2014)

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

Giant Slug

Monsters The Tortle Package

(2d4 + 2);{"diceNotation":"2d4+2","rollType":"damage","rollDamageType":"piercing"} piercing damage.Animate Tentacle. When the slug takes damage in this cave, it can use its reaction to animate one of

the tentacles of the kraken statue and cause it to make a melee weapon attack (+3;{"diceNotation":"1d20+3","rollType":"to hit"} to hit) against one creature within 20 feet of the statue that the slug

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

Dominate Beast Legacy

Spells Basic Rules (2014)

. 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)

. 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

Strongheart

Monsters The Wild Beyond the Witchlight

can also cause the blade to gleam with holy light. If he does so, the target is blinded until the start of Strongheart’s next turn. Revivify (Recharges at the Next Dawn). While holding Steel

, Strongheart can use his reaction to impose disadvantage on the attack roll, provided he is carrying a shield.Strongheart is a fearless seeker of justice, risking his life to ensure that good triumphs over

Skyblinder Staff

Magic Items Guildmasters’ Guide to Ravnica

makes an attack roll against you, you can use your reaction to hold the staff aloft and cause it to flare with light. The attacker has disadvantage on the attack roll, and it must succeed on a DC 15 Constitution saving throw or be blinded until the start of its next turn.

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

Norker

Monsters Mordenkainen's Fiendish Folio Volume 1

creature within 5 feet of the norker makes a melee attack against it, the norker can use its reaction to cause 4 piercing damage to it.Cruel, vicious, and lazy even by the standards of goblinoids

Wall of Stone Legacy

Spells Basic Rules (2014)

success, it can use its reaction to move up to its speed so that it is no longer enclosed by the wall. The wall can have any shape you desire, though it can't occupy the same space as a creature or

. The wall is an object made of stone that can be damaged and thus breached. Each panel has AC 15 and 30 hit points per inch of thickness. Reducing a panel to 0 hit points destroys it and might cause

Find Familiar Legacy

Spells Basic Rules (2014)

dimension. Alternatively, you can dismiss it forever. As an action while it is temporarily dismissed, you can cause it to reappear in any unoccupied space within 30 feet of you. Whenever the familiar

instead cause it to adopt a new form. Choose one of the forms from the above list. Your familiar transforms into the chosen creature. Finally, when you cast a spell with a range of touch, your

Norker War Leader

Monsters Mordenkainen's Fiendish Folio Volume 1

make a single melee attack.Defensive Rebuke. If a creature within 5 feet of the norker makes a melee attack against it, the norker can use its reaction to cause 6 piercing damage to it.Cruel, vicious

Reborn

Species Van Richten’s Guide to Ravenloft

physical state that their minds are ill equipped to deal with. Their memories of events before this interruption are often vague or absent. Occasionally, the most unexpected experiences might cause

perfectly preserved remains. Lamordia. You awoke amid the bizarre experiments of an amoral scientist. They consider you their finest creation or have a task for you to fulfill. Mordent. You emerged from the mysterious device known as the Apparatus, your body a lifeless shell and your past a mystery.

Zuggtmoy Legacy

Monsters Out of the Abyss

Thrall. When Zuggtmoy is hit by an attack, one creature within 5 feet of Zuggtmoy that is charmed by her must use its reaction to be hit by the attack instead.Zuggtmoy can take 3 legendary actions

turn. Attack. Zuggtmoy makes one pseudopod attack. Exert Will. One creature charmed by Zuggtmoy that she can see must use its reaction to move up to its speed as she directs or to make a weapon

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

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

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

Pennant of the Vind Rune

Magic Items Storm King's Thunder

another means of staying aloft. Comforting Wind. You can’t suffocate. Wind’s Grasp. As a reaction when you fall, you can cause yourself to take no damage from the fall. Once you use this

Graz'zt Legacy

Monsters Out of the Abyss

reaction to move up to its speed as Graz’zt directs. Sow Discord. Graz’zt casts crown of madness or dissonant whispers. Teleport. Graz’zt uses his Teleport action.The appearance of the

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

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

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

until the creature is freed by the Greater Restoration spell or other magic. A creature can use its reaction, if available, to shut its eyes to avoid the saving throw. If the creature does so, it has the blinded condition until the end of its next turn.

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

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

Belashyrra

Monsters Eberron: Rising from the Last War

succeed on a DC 22 Wisdom saving throw or take 22 (4d10);{"diceNotation":"4d10","rollType":"damage","rollAction":"Implant Fear","rollDamageType":"psychic"} psychic damage and immediately use its reaction

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

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

Radiant Weapon

Compendium - Sources->Dungeons & Dragons->Wayfinder's Guide to Eberron

has 4 charges. As a reaction immediately after being hit by an attack, the wielder can expend 1 charge and cause the attacker to be blinded until the end of the attacker’s next turn, unless the attacker

, the wielder can take a bonus action to cause it to shed bright light in a 30-foot radius and dim light for an additional 30 feet. The wielder can extinguish the light as a bonus action. The weapon

D&D Beyond

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