before based during causing reaction

Warrior Commander

Monsters Monster Manual

effects: Sap. The target has Disadvantage on its next attack roll before the start of the warrior’s next turn. Maneuver. One ally who can see or hear the warrior can take a Reaction to move up

until the end of the target’s next turn.Counterattack. Trigger: The warrior is hit by an attack roll. Response: The warrior adds 4 to its AC against that attack, possibly causing it to miss. On a

Marilith

Monsters Monster Manual

Resistance. The marilith has Advantage on saving throws against spells and other magical effects. Reactive. The marilith can take one Reaction on every turn of combat.Multiattack. The marilith makes six Pact

ends.Parry. Trigger: The marilith is hit by a melee attack roll while holding a weapon. Response: The marilith adds 5 to its AC against that attack, possibly causing it to miss.PoisonCold, Fire

Rope of Entanglement

Magic Items Dungeon Master’s Guide

. The target must succeed on a DC 15 Dexterity saving throw or have the Restrained condition. You can release the target by letting go of your end of the rope (causing the rope to coil up in the target

’s space) or by using a Bonus Action to repeat the command (causing the rope to coil up in your hand). A target Restrained by the rope can take an action to make its choice of a DC 15 Strength

Defensive Duelist

Feats Player’s Handbook

a Finesse weapon and another creature hits you with a melee attack, you can take a Reaction to add your Proficiency Bonus to your Armor Class, potentially causing the attack to miss you. You gain this bonus to your AC against melee attacks until the start of your next turn.

Quarterstaff of the Acrobat

Magic Items Dungeon Master’s Guide

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

Defensive Duelist Legacy

Feats Player’s Handbook (2014)

When you are wielding a finesse weapon with which you are proficient and another creature hits you with a melee attack, you can use your reaction to add your proficiency bonus to your AC for that attack, potentially causing the attack to miss you.

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

Duergar Kavalrachni Legacy

Monsters Out of the Abyss

Cavalry Training. When the duergar hits a target with a melee attack while mounted on a female steeder, the steeder can make a melee attack against the same target as a reaction. Duergar Resilience

duergar magically increases in size, along with anything it is wearing or carrying. While enlarged, the duergar is Large, doubles its damage dice on Strength-based weapon attacks (included in the attacks

Lyre of Building

Magic Items Tasha’s Cauldron of Everything

While holding this lyre, you can cast mending as an action. You can also play the lyre as a reaction when an object or a structure you can see within 300 feet of you takes damage, causing it to be

Sanctum Amulet

Magic Items Bigby Presents: Glory of the Giants

taking damage, you can use your reaction to invoke the item’s rune, causing the pendant to flash with pale light. The creature then instead drops to 1 hit point. Once the rune has been invoked, it can’t be invoked again until the next dawn.

Opal of the Ild Rune

Magic Items Storm King's Thunder

This triangular fire opal measures about three inches on each side and is half an inch thick. The ild (fire) rune shimmers within its core, causing it to be slightly warm to the touch. The opal has

a benefit based on its form: Weapon. The weapon is now an uncommon magic weapon. It deals an extra 1d6 fire damage to any target it hits. Armor. The armor is now a rare magic item that requires attunement. You have resistance to cold damage while wearing the armor.

Duergar Warlord Legacy

Monsters Mordenkainen’s Tome of Foes

damage while enlarged. Call to Attack. Up to three allied duergar within 120 feet of this duergar that can hear it can each use their reaction to make one weapon attack. Enlarge (Recharges after a Short

or Long Rest). For 1 minute, the duergar magically increases in size, along with anything it is wearing or carrying. While enlarged, the duergar is Large, doubles its damage dice on Strength-based

Nilbog Legacy

Monsters Volo's Guide to Monsters

its Reversal of Fortune reaction. Nimble Escape. The nilbog can take the Disengage or Hide action as a bonus action on each of its turns.Fool’s Scepter. Melee Weapon Attack: +4;{"diceNotation

Maglubiyet, this trickster god survives in splintered form as a possessing spirit that arises when goblinoids form a host, causing disorder in the ranks unless it is appeased. Goblins have no name for

Orb of the Stein Rune

Magic Items Storm King's Thunder

item, which gains a benefit based on its form: Shield. The shield is now a rare magic item that requires attunement. While you wield it, you have resistance to all damage dealt by ranged weapon

attacks. Boots. The pair of boots is now an uncommon magic item that requires attunement. While you wear the boots, you have advantage on Strength saving throws, and you can use your reaction to avoid being knocked prone.

Yeenoghu Legacy

Monsters Out of the Abyss

atrocities in his name. Yeenoghu takes pleasure in causing fear before death, and he sows sorrow and despair through destroying beloved things. He doesn’t parlay; to meet him is to do battle with him

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

them into flind;flinds. Yeenoghu takes pleasure in causing fear before death, and he sows sorrow and despair through destroying beloved things. He doesn’t parlay; to meet him is to do battle with

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

Mite

Monsters Mordenkainen's Fiendish Folio Volume 1

, or a saving throw, it must roll a d6 and subtract the number rolled from the d20 roll. On any turn in which it suffers the effect of the hex, the target can attack an ally as a reaction, ignoring the

effect of the hex when it does so. It can then ignore the effect of the hex until the end of its turn.Mites are vexing fey creatures that delight in causing minor havoc and playing irritating pranks

Jiangshi

Monsters Van Richten’s Guide to Ravenloft

Jiangshi Weaknesses. The jiangshi has the following flaws: Fear of Its Own Reflection. If the jiangshi sees its own reflection, it immediately uses its reaction, if available, to move as far away

afflicts the limbs of jiangshi, causing them to hold their arms rigidly and to walk with a stiff gait. This, along with their flight, lead many to call them hopping vampires. By day, jiangshi lurk

Dandylion

Monsters Misplaced Monsters: Volume One

is enriched, restoring withered vegetation in the area to full health and causing all crops in the area to produce twice the normal harvest for the next year. Spellcasting. The dandylion casts one of

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

Occultant Abacus

Magic Items Acquisitions Incorporated

. The difference between the index finger and the middle finger. The elasticity of the ear lobe. 6 You take a long, careful look, and then decide based on which fellow franchisee has been nice to

long rest. Bead of Instant Karma At rank 3, one of the beads on your occultant abacus channels the power of instant karma, turning the occultant abacus into a rare magic item. As a reaction, you can

Staff of the Magi Legacy

Magic Items Basic Rules (2014)

holding the staff, you have advantage on saving throws against spells. In addition, you can use your reaction when another creature casts a spell that targets only you. If you do, the staff absorbs the

amount of damage based on how far away it is from the point of origin, as shown in the following table. On a successful save, a creature takes half as much damage. Distance from Origin Damage

Gift of the Metallic Dragon

Feats Fizban's Treasury of Dragons

equal to your proficiency bonus against that attack roll, potentially causing it to miss. You can use this reaction a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.

another creature you can see within 5 feet of you is hit by an attack roll, you can use your reaction to manifest spectral wings from your back for a moment. You grant a bonus to the target’s AC

Duergar Warlord

Monsters Mordenkainen Presents: Monsters of the Multiverse

use their reaction to make one weapon attack. Invisibility (Recharge 4–6);{"diceNotation":"1d6", "rollType":"recharge", "rollAction":"Invisibility"}. The duergar magically turns invisible for up to 1

Rest). For 1 minute, the duergar magically increases in size, along with anything it is wearing or carrying. While enlarged, the duergar is Large, doubles its damage dice on Strength-based weapon

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

appears in silver on the chosen item, which gains a benefit based on its form: Armor. The armor is now an uncommon magic item that requires attunement. You gain a bonus to speed of 5 feet while you

Ulitharid

Monsters Mordenkainen Presents: Monsters of the Multiverse

: a larger and more potent mind flayer with six tentacles. Illithids innately recognize that an ulitharid’s survival is more important than their own. An elder brain’s reaction to the rise

are then planted in the ulitharid’s corpse, causing it to dissolve into ichor. This psionically potent slime helps to fuel the transformation of the area into a brine pool for the embryonic elder brain.

Yuan-ti Pureblood Legacy

Species Volo's Guide to Monsters

with that of snakes, producing a caste-based society of hybrids in which the most snakelike are the leaders and the most humanlike are spies and agents in foreign lands. Humans Transformed The

caste system based on how complete a person’s transformation was. The vast majority of yuan-ti fall into three categories — abominations, malisons, and purebloods — while the mutated

Young Sapphire Dragon

Monsters Fizban's Treasury of Dragons

strategies and ambushes based on their ability to maneuver underground. A sapphire dragon often refrains from striking immediately, preferring to assess intruders first in order to devise the most

population, but the galeb duhr are causing trouble for local miners. 4 Two Lolth cultist;cultists seek a magical relic that attracts giant spider;giant spiders, but the relic’s resting place has

Level 7: Flash of Genius

Compendium - Sources->Dungeons & Dragons->Eberron: Forge of the Artificer

Level 7: Flash of Genius When you or a creature you can see within 30 feet of you fails an ability check or a saving throw, you can take a Reaction to add a bonus to the roll, potentially causing it

to succeed. The bonus equals your Intelligence modifier (minimum of +1). You can take this Reaction a number of times equal to your Intelligence modifier (minimum of once). You regain all expended uses when you finish a Long Rest.

Other Demons

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

Other Demons Demons of sufficient cunning and power can bestow boons, using the boons’ recipients as pawns. A demon can grant a special trait based on its type, as shown below. Balor Fiery Soul. This

can perfectly recall any path it has traveled. Marilith Serpentine Reaction. This creature can take an extra reaction each round, but this reaction can be used only to make an opportunity attack. Nalfeshnee Guarded Mind. This creature is immune to the frightened condition.

Defensive Duelist

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

reaction to add your proficiency bonus to your AC for that attack, potentially causing the attack to miss you.

Soul of Artifice

Compendium - Sources->Dungeons & Dragons->Eberron: Rising from the Last War

attuned to. If you’re reduced to 0 hit points but not killed outright, you can use your reaction to end one of your artificer infusions, causing you to drop to 1 hit point instead of 0.

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

Defensive Duelist

Compendium - Sources->Dungeons & Dragons->Player’s Handbook

you’re holding a Finesse weapon and another creature hits you with a melee attack, you can take a Reaction to add your Proficiency Bonus to your Armor Class, potentially causing the attack to miss you. You gain this bonus to your AC against melee attacks until the start of your next turn.

Soul of Artifice

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

attuned to. If you’re reduced to 0 hit points but not killed outright, you can use your reaction to end one of your artificer infusions, causing you to drop to 1 hit point instead of 0.

Soul of Artifice

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

item you are currently attuned to. If you’re reduced to 0 hit points but not killed outright, you can use your reaction to end one of your artificer infusions, causing you to drop to 1 hit point instead of 0.

D&D Beyond

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