before being die constructs reaction

Polearm Master

Feats Player’s Handbook

the opposite end of the weapon. The weapon deals Bludgeoning damage, and the weapon’s damage die for this attack is a d4. Reactive Strike. While you’re holding a Quarterstaff, a Spear

, or a weapon that has the Heavy and Reach properties, you can take a Reaction to make one melee attack against a creature that enters the reach you have with that weapon.

Power Word Heal Legacy

Spells Player’s Handbook (2014)

A wave of healing energy washes over the creature you touch. The target regains all its hit points. If the creature is charmed, frightened, paralyzed, or stunned, the condition ends. If the creature is prone, it can use its reaction to stand up. This spell has no effect on undead or constructs.

Allip Legacy

Monsters Mordenkainen’s Tome of Foes

Madness","rollDamageType":"psychic"} psychic damage and must use its reaction to make a melee weapon attack against one creature of the allip's choice that the allip can see. Constructs and undead are

stunned until the end of its next turn. On a successful save, it takes half as much damage and isn't stunned. Constructs and undead are immune to this effect.Cold, Necrotic, PoisonAcid, Fire, Lightning, Thunder; Bludgeoning, Piercing, and Slashing from Nonmagical Attacks

Hydra Legacy

Monsters Basic Rules (2014)

, charmed, deafened, frightened, stunned, and knocked unconscious. Whenever the hydra takes 25 or more damage in a single turn, one of its heads dies. If all its heads die, the hydra dies. At the end of

. Reactive Heads. For each head the hydra has beyond one, it gets an extra reaction that can be used only for opportunity attacks. Wakeful. While the hydra sleeps, at least one of its heads is

Abi-Dalzim's Horrid Wilting

Spells Elemental Evil Player's Companion

You draw the moisture from every creature in a 30-foot cube centered on a point you choose within range. Each creature in that area must make a Constitution saving throw. Constructs and undead aren

. Nonmagical plants in the area that aren’t creatures, such as trees and shrubs, wither and die instantly.

Snapping Hydra

Monsters Monstrous Compendium Vol. 4: Eldraine Creatures

Amphibious. The hydra can breathe air and water. Multiple Heads. The hydra has five heads. Whenever the hydra takes 30 or more damage in a single turn, one of its heads dies. If all its heads die

points for each head regrown this way. Reactive Heads. For each head the hydra has beyond one, it gets an extra reaction that can be used only for opportunity attack;opportunity attacks. Wakeful. While

Telepathic Pentacle

Monsters Icewind Dale: Rime of the Frostmaiden

. If all its heads die, the Telepathic Pentacle dies. At the end of its turn, it grows two heads for each of its heads that died since its last turn, unless it has taken fire damage since its last turn

. The Telepathic Pentacle regains 10 hit points for each head regrown in this way. Reactive Heads. For each head the Telepathic Pentacle has beyond one, it gets an extra reaction that can be used only

Allip

Monsters Mordenkainen Presents: Monsters of the Multiverse

", "rollDamageType":"psychic"} psychic damage, and it is stunned until the end of its next turn. On a successful save, it takes half as much damage and isn’t stunned. Constructs and Undead are immune to this

":"2d8+3", "rollType":"damage", "rollAction":"Whispers of Compulsion", "rollDamageType":"psychic"} psychic damage and must use its reaction to make a melee weapon attack against one creature of the

Elder Oblex Legacy

Monsters Mordenkainen’s Tome of Foes

","rollDamageType":"psychic"} psychic damage and become memory drained until it finishes a short or long rest or until it benefits from the greater restoration or heal spell. Constructs, oozes, plants, and

drained beyond the first, the die size increases by one: the d4 becomes a d6, the d6 becomes a d8, and so on until the die becomes a d20, at which point the target becomes unconscious for 1 hour. The

Adult Oblex Legacy

Monsters Mordenkainen’s Tome of Foes

greater restoration or heal spell. Constructs, oozes, plants, and undead succeed on the save automatically. While memory drained, the target must roll a d4 and subtract the number rolled from any

ability check or attack roll it makes. Each time the target is memory drained beyond the first, the die size increases by one: the d4 becomes a d6, the d6 becomes a d8, and so on until the die becomes a

Memory Web

Monsters Quests from the Infinite Staircase

Intelligence saving throw. Constructs, Oozes, Plants, and Undead succeed on the save automatically. On a failed save, the target takes 5 (2d4);{"diceNotation":"2d4", "rollType":"damage", "rollAction":"Drain

the first, the die size increases by one: the d4 becomes a d6, the d6 becomes a d8, and so on until the die becomes a d20, at which point the target has the unconscious condition for 1 hour. If a memory

Jarund Elkhardt

Monsters Icewind Dale: Rime of the Frostmaiden

Brute. A melee weapon deals one extra die of its damage when Jarund hits with it (included in the attack).Multiattack. Jarund makes three melee attacks. Warhammer. Melee Weapon Attack: +7

the target is pushed to within 5 feet of a creature friendly to Jarund, that creature can make an attack against the target as a reaction. Javelin. Melee or Ranged Weapon Attack: +7;{"diceNotation

Warlord

Monsters Mordenkainen Presents: Monsters of the Multiverse

target can see or hear the warlord, the target can make one weapon attack as a reaction and gains advantage on the attack roll. Weapon Attack. The warlord makes one Greatsword or Shortbow attack

take on the role of monarch or general and attract followers willing to die for the warlord’s banner. Warlords urge their troops into the fray with shouted exhortations. You can roll on the

Ironscale Hydra

Monsters Mythic Odysseys of Theros

against being blinded, charmed, deafened, frightened, stunned, or knocked unconscious. Whenever the hydra takes 35 or more damage in a single turn, one of its heads dies. If all its heads die, the

each head regrown in this way. Reactive Heads. For each head the hydra has beyond one, it gets an extra reaction that can be used only for opportunity attacks. Wakeful. While the hydra sleeps, at least

Elder Oblex

Monsters Mordenkainen Presents: Monsters of the Multiverse

Memories", "rollDamageType":"psychic"} psychic damage and become memory drained until it finishes a short or long rest or until it benefits from the greater restoration or heal spell. Constructs, Oozes

memory drained beyond the first, the die size increases by one: the d4 becomes a d6, the d6 becomes a d8, and so on until the die becomes a d20, at which point the target becomes unconscious for 1 hour

Dracohydra

Monsters Fizban's Treasury of Dragons

knocked unconscious. Whenever the dracohydra takes 30 or more damage in a single turn, one of its heads dies. If all its heads die, the dracohydra dies. At the end of its turn, the dracohydra grows two

. For each head the dracohydra has beyond one, it gets an extra reaction that can be used only for opportunity attacks. Wakeful. While the dracohydra sleeps, at least one of its heads is

Rakdos Riteknife

Magic Items Guildmasters’ Guide to Ravnica

. Annihilation. If the dagger holds five souls, you can use this property: As a reaction immediately after you hit a creature with the dagger and deal damage to that target, you can release all five souls. If the

target now has fewer than 75 hit points, it must succeed on a DC 15 Constitution saving throw or die. If the target dies, you can’t use this property again until you finish a long rest.

Adult Oblex

Monsters Mordenkainen Presents: Monsters of the Multiverse

", "rollDamageType":"psychic"} psychic damage and become memory drained until it finishes a short or long rest or until it benefits from the greater restoration or heal spell. Constructs, Oozes, Plants, and

drained beyond the first, the die size increases by one: the d4 becomes a d6, the d6 becomes a d8, and so on until the die becomes a d20, at which point the target becomes unconscious for 1 hour. The effect

Goose Mother

Monsters Monstrous Compendium Vol. 4: Eldraine Creatures

damage in a single turn, one of its heads dies. If all its heads die, the Goose Mother dies. At the end of its turn, the Goose Mother grows two heads for each of its heads that died since its last

an extra reaction that can be used only for opportunity attack;opportunity attacks. Wakeful. While the Goose Mother sleeps, at least one of its heads is awake.Multiattack. The Goose Mother makes as

Shield of the Uven Rune

Magic Items Waterdeep: Dungeon of the Mad Mage

cold damage. Deadly Rebuke. Immediately after a creature hits you with a melee attack, you can use your reaction to deal 3d6 necrotic damage to that creature. Bane. You can cast the bane spell from

has the properties of a +1 weapon. The bonus increases to +3 when the weapon is used against one of the following creature types, chosen by you at the time of the magic weapon’s creation: aberrations, celestials, constructs, dragons, elementals, fey, fiends, giants, or undead.

Dullahan

Monsters Van Richten’s Guide to Ravenloft

Headless Summoning (Recharges after a Short or Long Rest). If the dullahan is reduced to 0 hit points, it doesn’t die or fall unconscious. Instead, it regains 97 hit points. In addition, it

use its reaction to make a melee attack. Headless Wail (Costs 2 Actions). An echoing shriek issues from the dullahan’s headless stump. Each creature of the dullahan’s choice within 10

Polukranos

Monsters Mythic Odysseys of Theros

. Whenever Polukranos takes 40 or more damage in a single turn, one of its heads dies. If all its heads die, Polukranos dies. At the end of its turn, it grows two heads for each of its heads that died

beyond one, it gets an extra reaction that can be used only to make opportunity attacks. Siege Monster. Polukranos deals double damage to objects and structures. Wakeful. While Polukranos sleeps, at

Bountiful Luck

Feats Xanathar's Guide to Everything

. Surely a sign of fortune’s favor! When an ally you can see within 30 feet of you rolls a 1 on the d20 for an attack roll, an ability check, or a saving throw, you can use your reaction to let the

ally reroll the die. The ally must use the new roll. When you use this ability, you can’t use your Lucky racial trait before the end of your next turn.

Geryon

Monsters Mordenkainen Presents: Monsters of the Multiverse

–6). As a reaction when this creature takes damage, it can roll a d10 and subtract the number rolled from the damage. Geryon (Variant);VARIANT: SOUND THE HORN Geryon can have an action that

; (see the Monster Manual) to appear in unoccupied spaces of his choice within 600 feet of him. The minotaurs roll initiative when they appear, and they obey his commands. They remain until they die

Rak Tulkhesh

Monsters Eberron: Rising from the Last War

). Each creature within 60 feet of Rak Tulkhesh must succeed on a DC 24 Wisdom saving throw or use its reaction to make a melee weapon attack against a random creature within reach. If no creatures

can't die permanently. Upon its death, it reforms elsewhere in the multiverse and becomes active again at a time set by the DM. Rak Tulkhesh Called the Rage of War, Rak Tulkhesh is the incarnation of

Geryon (Variant)

Monsters Mordenkainen Presents: Monsters of the Multiverse

appear, and they obey his commands. They remain until they die or Geryon uses an action to dismiss any or all of them.Geryon can take 3 legendary actions, choosing from the options below. Only one

(Recharge 5–6). As a reaction when this creature takes damage, it can roll a d10 and subtract the number rolled from the damage. Cold, Fire, PoisonBludgeoning, Piercing, and Slashing from Nonmagical Attacks that aren't Silvered

Power Word Heal

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

its hit points. If the creature is charmed, frightened, paralyzed, or stunned, the condition ends. If the creature is prone, it can use its reaction to stand up. This spell has no effect on undead or constructs.

Brace

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

Brace When a creature you can see moves into the reach you have with the melee weapon you’re wielding, you can use your reaction to expend one superiority die and make one attack against the creature, using that weapon. If the attack hits, add the superiority die to the weapon’s damage roll.

Abi-Dalzim's Horrid Wilting

Compendium - Sources->Dungeons & Dragons->Princes of the Apocalypse

-foot cube centered on a point you choose within range. Each creature in that area must make a Constitution saving throw. Constructs and undead aren’t affected, and plants and water elementals make

this saving throw with disadvantage. A creature takes 12d8 necrotic damage on a failed save, or half as much damage on a successful one. Nonmagical plants in the area that aren’t creatures, such as trees and shrubs, wither and die instantly.

Abi-Dalzim's Horrid Wilting

Compendium - Sources->Dungeons & Dragons->Xanathar's Guide to Everything

-foot cube centered on a point you choose within range. Each creature in that area must make a Constitution saving throw. Constructs and undead aren’t affected, and plants and water elementals make

this saving throw with disadvantage. A creature takes 12d8 necrotic damage on a failed save, or half as much damage on a successful one. Nonmagical plants in the area that aren’t creatures, such as trees and shrubs, wither and die instantly.

Battle Master

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

can see or hear you and expend one superiority die. That creature can immediately use its reaction to make one weapon attack, adding the superiority die to the attack’s damage roll. Disarming Attack

modifier. Riposte. When a creature misses you with a melee attack, you can use your reaction and expend one superiority die to make a melee weapon attack against the creature. If you hit, you add the

Fighting Style Options

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

creature successfully hides from you. Interception When a creature you can see hits a target, other than you, within 5 feet of you with an attack, you can use your reaction to reduce the damage the target

takes by 1d10 + your proficiency bonus (to a minimum of 0 damage). You must be wielding a shield or a simple or martial weapon to use this reaction. Superior Technique You learn one maneuver of your

Bountiful Luck

Compendium - Sources->Dungeons & Dragons->Xanathar's Guide to Everything

your reaction to let the ally reroll the die. The ally must use the new roll. When you use this ability, you can’t use your Lucky racial trait before the end of your next turn.

Teeth of Dahlver-Nar

Magic Items Tasha’s Cauldron of Everything

tooth, roll a die at the end of your turn. On an even number, the tooth vanishes, and creatures appear as if you sowed the tooth, but they are hostile to you and your allies. On an odd number, the

, you can use your reaction to cause them to be hit instead. You can’t use this reaction again until you finish a short or long rest. 4 The Mill Road Murders (halfling canine) 3 green hag

Allip

Compendium - Sources->Dungeons & Dragons->Storm Lord’s Wrath

reaction to make a melee weapon attack against one creature of the allip’s choice that the allip can see. Constructs and undead are immune to this effect. Howling Babble (Recharge 6). Each creature

successful save, it takes half as much damage and isn’t stunned. Constructs and undead are immune to this effect.

D&D Beyond

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