better before diffusing can reactions

Swarm of Dretches

Monsters Monster Manual

its next turn. While Poisoned, the target can take either an action or a Bonus Action on its turn, not both, and it can’t take Reactions. Swarm. The swarm can occupy another creature’s

space and vice versa, and the swarm can move through any opening large enough for a Small creature. The swarm can’t regain Hit Points or gain Temporary Hit Points.Multiattack. The swarm makes two

Arms of Hadar

Spells Player’s Handbook

damage and can’t take Reactions until the start of its next turn. On a successful save, a target takes half as much damage only. Using a Higher-Level Spell Slot. The damage increases by 1d6 for each spell slot level above 1.

Young Copper Dragon

Monsters Monster Manual

;t take Reactions; its Speed is halved; and it can take either an action or a Bonus Action on its turn, not both. This effect lasts until the end of its next turn.Acid

Multiattack. The dragon makes three Rend attacks. It can replace one attack with a use of Slowing Breath. Rend. Melee Attack Roll: +7;{"diceNotation":"1d20+7", "rollType":"to hit", "rollAction

Copper Dragon Wyrmling

Monsters Monster Manual

. Constitution Saving Throw: DC 11, each creature in a 15-foot Cone. Failure: The target can’t take Reactions; its Speed is halved; and it can take either an action or a Bonus Action on its turn, not both. This effect lasts until the end of its next turn.Acid

Slow

Spells Player’s Handbook

target’s Speed is halved, it takes a −2 penalty to AC and Dexterity saving throws, and it can’t take Reactions. On its turns, it can take either an action or a Bonus Action, not both

, and it can make only one attack if it takes the Attack action. If it casts a spell with a Somatic component, there is a 25 percent chance the spell fails as a result of the target making the spell

Umber Hulk

Monsters Monster Manual

. Failure: The target can’t take Reactions until the start of the umber hulk’s next turn, and the target rolls 1d8;{"diceNotation":"1d8", "rollType":"roll", "rollAction":"Confusing Gaze"} to

Tunneler. The umber hulk can burrow through solid rock at half its Burrow Speed and leaves a 10-foot-diameter tunnel in its wake.Multiattack. The umber hulk makes three Rend attacks. Rend. Melee

Spectator

Monsters Monster Manual

12. Failure: 5 (2d4);{"diceNotation":"2d4", "rollType":"damage", "rollAction":"Confusion Ray", "rollDamageType":"Psychic"} Psychic damage, and the target can’t take Reactions until the end of

", "rollType":"damage", "rollAction":"Bite", "rollDamageType":"Piercing"} Piercing damage. Eye Rays. The spectator randomly shoots one of the following magical rays at a target it can see within 90

Balor

Monsters Monster Manual

":"Lightning"} Lightning damage, and the target can’t take Reactions until the start of the balor’s next turn.Fire, PoisonCold, LightningTeleport. The balor teleports itself or a willing demon within 10 feet of itself up to 60 feet to an unoccupied space the balor can see.

"} Fire damage. Legendary Resistance (3/Day). If the balor fails a saving throw, it can choose to succeed instead. Magic Resistance. The balor has Advantage on saving throws against spells and other

Ancient Copper Dragon

Monsters Monster Manual

. Constitution Saving Throw: DC 22, each creature in a 90-foot Cone. Failure: The target can’t take Reactions; its Speed is halved; and it can take either an action or a Bonus Action on its turn

Legendary Resistance (4/Day, or 5/Day in Lair). If the dragon fails a saving throw, it can choose to succeed instead.Multiattack. The dragon makes three Rend attacks. It can replace one attack with a

Adult Copper Dragon

Monsters Monster Manual

. Constitution Saving Throw: DC 18, each creature in a 60-foot Cone. Failure: The target can’t take Reactions; its Speed is halved; and it can take either an action or a Bonus Action on its turn

Legendary Resistance (3/Day, or 4/Day in Lair). If the dragon fails a saving throw, it can choose to succeed instead.Multiattack. The dragon makes three Rend attacks. It can replace one attack with a

Confusion

Spells Player’s Handbook

Each creature in a 10-foot-radius Sphere centered on a point you choose within range must succeed on a Wisdom saving throw, or that target can’t take Bonus Actions or Reactions and must roll

Wand of Orcus

Magic Items Dungeon Master’s Guide

some fell goal. The wand is topped with a skull that once belonged to a human hero slain by Orcus. The wand can magically change in size to better conform to the grip of its user. All Holy Water

. On a failed save, the creature dies and, if it is a Humanoid, turns into a Zombie. Magic Weapon. You can wield the wand as a magic Mace that grants a +3 bonus to attack rolls and damage rolls made

Summon Construct

Spells Player’s Handbook

You call forth the spirit of a Construct. It manifests in an unoccupied space that you can see within range and uses the Construct Spirit stat block. When you cast the spell, choose a material: Clay

takes 1d10 Fire damage. Stony Lethargy (Stone Only). When a creature starts its turn within 10 feet of the spirit, the spirit can target it with magical energy if the spirit can see it. Wisdom Saving

Magic Jar

Spells Player’s Handbook

surroundings as if you were in the container’s space. You can’t move or take Reactions. The only action you can take is to project your soul up to 100 feet out of the container, either

returning to your living body (and ending the spell) or attempting to possess a Humanoid’s body. You can attempt to possess any Humanoid within 100 feet of you that you can see (creatures warded

Arch-hag

Monsters Monster Manual

hag’s next turn. The target can’t take Reactions until the curse ends. Spellcasting. The hag casts one of the following spells, requiring no Material components and using Charisma as the

Coven Magic. While within 30 feet of at least two hag allies, the hag can cast one of the following spells, requiring no Material components, using the spell’s normal casting time, and using

Beholder

Monsters Monster Manual

", "rollDamageType":"Necrotic"} Necrotic damage. Until the end of the target’s next turn, the target’s Speed is halved; the target can’t take Reactions; and it can take either an action or a

Legendary Resistance (3/Day, or 4/Day in Lair). If the beholder fails a saving throw, it can choose to succeed instead.Multiattack. The beholder uses Eye Rays three times. Bite. Melee Attack Roll

Death Tyrant

Monsters Monster Manual

", "rollAction":"Slowing ray", "rollDamageType":"Necrotic"} Necrotic damage. Until the end of the target’s next turn, the target can’t take Reactions; its Speed is halved; and it can take

Legendary Resistance (3/Day, or 4/Day in Lair). If the death tyrant fails a saving throw, it can choose to succeed instead.Multiattack. The death tyrant uses Eye Rays three times. Bite. Melee Attack

Orien Enforcer

Monsters Eberron: Forge of the Artificer

", "rollType":"damage", "rollAction":"Lightning Cage", "rollDamageType":"Lightning"} Lightning damage, and the creature can’t take Reactions until the end of the enforcer’s next turn

Multiattack. The enforcer makes three Dagger attacks. It can replace one attack with a use of Lightning Cage if available. Dagger. Melee or Ranged Attack Roll: +6;{"diceNotation":"1d20+6", "rollType

Spirit Dragon Wyrmling