before black device 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

Blackrazor

Magic Items Dungeon Master’s Guide

Hidden in the dungeon of White Plume Mountain, Blackrazor shines like a piece of night sky filled with stars. Its black scabbard is decorated with pieces of cut obsidian. You gain a +3 bonus to

Blackrazor. Blackrazor can be destroyed by crushing it in the great gears of Mechanus. Primus, the creator of the modrons, also knows a series of musical tones that Blackrazor can’t stand to hear, causing the sword to shatter.

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

Iron Consul

Monsters Baldur’s Gate: Descent into Avernus

immediately use its reaction to make one melee attack.Bane’s devoted followers are warriors who seek to rule through martial strength and intimidation, cruel tyrants who use threats and gifts as

Bane are warriors who wear heavy armor and wield maces, swords, spears, and crossbows. They paint the right gauntlet of their armor black in honor of their patron. Bane’s clerics wield black

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.

A black opal pendant hangs at the base of this pearlescent chain. The sacred rune is inscribed on the back of the pendant. While wearing this item, you have resistance to necrotic damage

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.

Dusk Hag

Monsters Eberron: Rising from the Last War

undertaking quests or making bargains with a dusk hag in exchange for its prophecies and visions of the future. But the information gained from a dusk hag often has a way of causing more pain than joy. Like

all hags, dusk hags enjoy causing strife to those who bargain with them, and find ways to twist and turn promises to their own advantage. The Dusk Hag Prophecies table provides examples of the sort of

Burrowshark

Monsters Princes of the Apocalypse

Bond of the Black Earth. The burrowshark is magically bound to a bulette trained to serve as its mount. While mounted on its bulette, the burrowshark shares the bulette;bulette's senses and can ride

":"damage","rollAction":"Spear","rollDamageType":"piercing"} piercing damage if used with two hands to make a melee attack.Unyielding. When the burrowshark is subjected to an effect that would move it, knock it prone, or both, it can use its reaction to be neither moved nor knocked prone.

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

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

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

Absorbing Tattoo

Magic Items Tasha’s Cauldron of Everything

Blue 3 Absorbing Tattoo, Fire;Fire Red 4 Absorbing Tattoo, Force;Force White 5 Absorbing Tattoo, Lightning;Lightning Yellow 6 Absorbing Tattoo, Necrotic;Necrotic Black

Damage Absorption. When you take damage of the chosen type, you can use your reaction to gain immunity against that instance of the damage, and you regain a number of hit points equal to half the

Ooze Master

Monsters Tales from the Yawning Portal

, Melf's acid arrow, suggestion 3rd level (3 slots): fear, slow, stinking cloud 4th level (3 slots): confusion, Evard's black tentacles 5th level (1 slot): cloudkill Spider Climb. The Ooze Master can

30 feet of it, the Ooze Master can use a reaction to divert the attack if another creature is within the attack's range. The attacker must make a DC 15 Wisdom saving throw. On a failed save, the

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

Tiamat

Monsters Tyranny of Dragons

effects. Magic Weapons. Tiamat’s weapon attacks are magical. Multiple Heads. Tiamat can take one reaction per turn, rather than only one per round. She also has advantage on saving throws

","rollAction":"Bite (Acid)","rollDamageType":"acid"} (black dragon head), lightning damage;{"diceNotation":"4d6","rollType":"damage","rollAction":"Bite (Lightning)","rollDamageType":"lightning"} (blue dragon

Undercity Medusa

Monsters Guildmasters’ Guide to Ravnica

medusas of Ravnica, often called gorgons, are a monstrous race of creatures that appear superficially similar to human women. In place of hair, a gorgon has a writhing mass of black, serpentine

dreams of one day reclaiming control of the Golgari Swarm, or at least causing pain to its current guildmaster, Jarad Vod Savo (whose own sister displaced the medusas from their position).

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

Mighty Servant of Leuk-o

Magic Items Tasha’s Cauldron of Everything

gleaming black alloy of unknown origin, the servant is often described as a combination of a disproportioned dwarf and an oversized beetle. The servant contains enough space for 1 ton of cargo and a

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

Sibriex

Monsters Mordenkainen Presents: Monsters of the Multiverse

whip. 66–70 The target’s entire eyes turn black, and it gains darkvision out to a range of 120 feet. 71–75 The target swells, tripling its weight. 76–80 The

feet. 91–95 The target’s body becomes unusually brittle, causing the target to have vulnerability to bludgeoning, piercing, and slashing damage. 96–00 The target grows

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

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.

Mizzium Apparatus

Magic Items Guildmasters’ Guide to Ravnica

Innovation is a dangerous pursuit, at least the way the mages of the Izzet League engage in it. As protection against the risk of an experiment going awry, they have developed a device to help

stinking cloud 4th-Level Spells d4 Spell 1 confusion 2 conjure minor elementals 3 Evard's black tentacles 4 ice storm 5th-Level Spells d4 Spell 1 animate objects 2 cloudkill 3 cone of cold 4 flame strike

Prisoner 13

Monsters Keys from the Golden Vault

knocked prone. River Tattoo. Prisoner 13 magically ends any effects causing the grappled or restrained conditions on herself. If she is bound with nonmagical restraints, she slips out of them.Readiness

. Black and gray smoke and shadows coil down her left arm, ending in runes on the fingers of her left hand. Knotwork. Purple and blue knotwork and runes run down her right arm, across the back of her right

Deck of Many Things Legacy

Magic Items Basic Rules (2014)

alteration, causing your alignment to change. Lawful becomes chaotic, good becomes evil, and vice versa. If you are true neutral or unaligned, this card has no effect on you. Comet. If you single

. Skull. You summon an avatar of death--a ghostly humanoid skeleton clad in a tattered black robe and carrying a spectral scythe. It appears in a space of the GM's choice within 10 feet of you and attacks

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

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

D&D Beyond

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