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Returning 35 results for 'must swarm'.
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Magic Items
Dungeon Master’s Guide (2024)
This staff has 10 charges.
Insect Cloud. While holding the staff , you can take a Magic action and expend 1 charge to cause a swarm of harmless flying insects to fill a 30-foot Emanation originating
from you. The insects remain for 10 minutes, making the area Heavily Obscured for creatures other than you. A strong wind (like that created by Gust of Wind) disperses the swarm and ends the effect
Magic Items
D&D Free Rules (2024)
special Somatic component: you must reach into the hat and “pull” the spell out of it.
Unknown Spell. While holding the hat, you can try to cast a level 1+ spell you don’t know. The
spell must be on the Wizard spell list, it must be of a level you can cast, and it can’t have Material components costing more than 1,000 GP. Once you decide on the spell, you must expend a spell
Monsters
Candlekeep Mysteries
False Objects. If the swarm is motionless at the start of combat, it has advantage on its initiative roll. Moreover, if a creature hasn’t observed the swarm move or act, that creature must
succeed on a DC 15 Wisdom (Perception) check to discern that the swarm is animate.
Swarm. The swarm can occupy another creature’s space and vice versa, and the swarm can move through any opening
Monsters
Fizban's Treasury of Dragons
False Appearance. If the swarm is motionless at the start of combat, it has advantage on its initiative roll. Moreover, if a creature hasn’t observed the swarm move or act, that creature must
they move about the lair.Bludgeoning, Piercing, SlashingScale Dust (1/Day). The swarm releases magical glittering dust from its wings. Each creature within 10 feet of the swarm must succeed on a DC 13
Monsters
Planescape: Adventures in the Multiverse
swarm must succeed on a DC 10 Constitution saving throw or have the stunned condition for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself
Swarm. The swarm can occupy another creature’s space and vice versa, and the swarm can move through any opening large enough for a Tiny dragonfly. The swarm can’t regain hit points or
Monsters
Spelljammer: Adventures in Space
Spider Climb. The swarm can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.
Swarm. The swarm can occupy another creature’s space and vice
versa, and the swarm can move through any opening large enough for a Tiny neogi hatchling. The swarm can’t regain hit points or gain temporary hit points.Swarm of Bites. Melee Weapon Attack: +3
Monsters
Mordenkainen Presents: Monsters of the Multiverse
Swarm. The swarm can occupy another creature’s space and vice versa, and the swarm can move through any opening large enough for a Tiny maggot. The swarm can’t regain hit points or gain
temporary hit points.Bites. Melee Weapon Attack: +0;{"diceNotation":"1d20+0", "rollType":"to hit", "rollAction":"Bites"} to hit, reach 0 ft., one creature in the swarm’s space. Hit: 7 (2d6
Monsters
Van Richten’s Guide to Ravenloft
Swarm. The swarm can occupy another creature’s space and vice versa, and the swarm can move through any opening large enough for a Tiny limb. The swarm can’t regain hit points or gain
temporary hit points.
Unusual Nature. The swarm doesn’t require air, food, drink, or sleep.Multiattack. The swarm makes one Undead Mass attack and one Grasping Limbs attack.
Undead Mass. Melee
Monsters
Planescape: Adventures in the Multiverse
the spellcasting ability (spell save DC 13):
At will: command,* detect thoughts,* sending*
1/day each: confusion,* dominate monster*
*To cast this spell, the swarm must have more than half its hit
Psychic Messenger. The swarm can use its sending spell to target someone familiar to a creature in telepathic contact with the swarm.
Swarm. The swarm can occupy another creature’s space and
Monsters
The Wild Beyond the Witchlight
Mimicry. Each campestri in the swarm can mimic any voice or song it has heard, albeit in a nasal falsetto.
Swarm. The swarm can occupy another creature’s space and vice versa, and the
swarm can move through any opening large enough to accommodate an individual campestri. The swarm can’t regain hit points or gain temporary hit points.Head Butts. Melee Weapon Attack: +0
Monsters
Tales from the Yawning Portal
","rollType":"damage","rollAction":"Bite","rollDamageType":"piercing"} piercing damage if the swarm has half of its hit points or fewer. If the target is a creature, it must succeed on a DC 10 Constitution
Keen Smell. The swarm has advantage on Wisdom (Perception) checks that rely on smell.
Swarm. The swarm can occupy another creature's space and vice versa, and the swarm can move through any opening
Monsters
Van Richten’s Guide to Ravenloft
","rollDamageType":"piercing"} piercing damage if the swarm has half of its hit points or fewer. A creature damaged by the swarm must succeed on a DC 12 Constitution saving throw or contract a disease
Swarm. The swarm can occupy another creature’s space and vice versa, and the swarm can move through any opening large enough for a Tiny maggot. The swarm can’t regain hit points or gain
Monsters
Mordenkainen Presents: Monsters of the Multiverse
within 20 feet of it. A swarm of insects (centipedes);swarm of insects (centipedes; see the Monster Manual) with 11 hit points emerges from the basket and rolls initiative. At the end of each of the swarm
’s turns, there’s a 50 percent;{"diceNotation":"1d100","rollType":"roll","rollAction":"Basket of Centipedes"} chance that the swarm disperses.
Green Slime Pot. The kobold throws a clay
Monsters
Monstrous Compendium Vol. 4: Eldraine Creatures
", "rollType":"damage", "rollAction":"Rancid Bite", "rollDamageType":"acid"} acid damage. If the target is a creature, it must succeed on a DC 12 Constitution saving throw or have the poisoned
condition until the start of the sewer king’s next turn.
Summon Swarm (1/Day). The sewer king chitters and summons a swarm of rats to its aid. The swarm appears in an unoccupied space within 30 feet of
Monsters
Thieves’ Gallery
each: Evard's black tentacles, finger of death, time stop
Swarm of Meteors (1/Day). Sofina magically calls down a meteor swarm that detonates in four 40-foot-radius spheres, each one centered on a point
she can see within 1 mile of herself. These spheres can overlap. Each creature in one or more of these spheres must make a DC 18 Dexterity saving throw, taking 35 (10d6);{"diceNotation":"10d6
Monsters
Van Richten’s Guide to Ravenloft
"} to determine the effect:
1–2. The gremishka emanates magical energy. Each creature within 30 feet of the gremishka must succeed on a DC 10 Constitution saving throw or take 3 (1d6
","rollType":"heal","rollAction":"Magic Allergy"} hit points.
5–6. The gremishka explodes and dies, and one swarm of gremishkas instantly appears in the space where this gremishka died. The swarm uses
Monsters
Eberron: Rising from the Last War
eyes. The target can't be revived by any means short of a wish spell until the quori is destroyed.
Mind Seed (1/Day). The quori touches one humanoid, which must succeed on a DC 21 Intelligence saving
can free the thrall from this control.
Swarm of Eyes (Recharge 6);{"diceNotation":"1d6","rollType":"recharge","rollAction":"Swarm of Eyes"}. The quori creates a swarm of spectral eyes that fills a 30
Monsters
The Book of Many Things
difficult terrain. When the sphere appears, each creature in it must make a DC 20 Constitution saving throw, taking 16 (3d10);{"diceNotation":"3d10", "rollType":"damage", "rollAction":"Insect Swarm
. Each creature in that cone must make a DC 20 Dexterity saving throw, taking 42 (12d6);{"diceNotation":"12d6", "rollType":"damage", "rollAction":"Mucus Spray", "rollDamageType":"acid"} acid damage on a
Monsters
Guildmasters’ Guide to Ravnica
damage.
Petrifying Gaze. The medusa fixes its gaze on one creature within 60 feet of it that it can see and that can see its eyes. The target must make a DC 14 Constitution saving throw. If the saving
throw fails by 5 or more, the creature is instantly petrified. Otherwise, a creature that fails the save begins to turn to stone and is restrained. The restrained creature must repeat the saving throw
Backgrounds
Guildmasters’ Guide to Ravnica
You are a member of a teeming horde — one small part of a sprawling organism. Just as you are part of the swarm, the swarm is part of a larger ecosystem, a never-ending cycle of life, death
stench.
Suggested Characteristics
Members of the Golgari Swarm are unmistakably products of the undercity, ill at ease amid the comforts of civilization. They bring about the same discomfort in others
Monsters
Adventure Atlas: The Mortuary
creature must succeed on a DC 18 Intelligence (Investigation) check to discern that the coffin is animate.
Spider Climb. The animated coffin can climb difficult surfaces, including upside down on
table presents some contents an animated coffin might contain when encountered.
Animated Coffin Contents
d6
Contents
1
1d4 swarm of bats
2
1d4 Skeleton;skeletons packed like
Monsters
Mythic Odysseys of Theros
addition, Arasta’s children immediately swarm over her body to protect her, granting her 100 temporary hit points.
Legendary Resistance (3/Day). If Arasta fails a saving throw, she can choose to
":"Bite","rollDamageType":"piercing"} piercing damage, and the target must make a DC 21 Constitution saving throw, taking 32 (5d12);{"diceNotation":"5d12","rollType":"damage","rollAction":"Bite
Monsters
Van Richten’s Guide to Ravenloft
Undead Fortitude. If damage reduces the zombie to 0 hit points, it must make a Constitution saving throw with a DC of 5 + the damage taken, unless the damage is radiant or from a critical hit. On a
plague spreader must make a DC 12 Constitution saving throw. On a failed save, the creature is poisoned and can’t regain hit points until the end of its next turn. On a successful save, the creature
Monsters
Van Richten’s Guide to Ravenloft
Deathly Stench. Any creature that starts its turn within 10 feet of the zombie must succeed on a DC 14 Constitution saving throw or take 9 (2d8) poison damage and be poisoned until the start of the
creature’s next turn.
Undead Fortitude. If damage reduces the zombie to 0 hit points, it must make a Constitution saving throw with a DC of 5 + the damage taken, unless the damage is radiant or
Monsters
Mordenkainen Presents: Monsters of the Multiverse
Return to Worms. When the mage is reduced to 0 hit points, it breaks apart into a swarm of insects (see the Monster Manual) in the same space. Unless the swarm is destroyed, the mage reforms from it
., one target. Hit: 7 (1d8 + 3);{"diceNotation":"1d8+3", "rollType":"damage", "rollAction":"Slam", "rollDamageType":"bludgeoning"} bludgeoning damage, and the target must succeed on a DC 19 Constitution
Monsters
Curse of Strahd
destroyed.
While he has 0 hit points in mist form, he can’t revert to his vampire form, and he must reach his coffin within 2 hours or be destroyed. Once in his coffin, he reverts to his vampire
vampire spawn under Strahd’s control.
Charm. Strahd targets one humanoid he can see within 30 feet of him. If the target can see Strahd, the target must succeed on a DC 17 Wisdom saving throw
Monsters
Guildmasters’ Guide to Ravnica
the target must make a DC 14 Constitution saving throw, taking 18 (4d8);{"diceNotation":"4d8","rollType":"damage","rollAction":"Fungal Rot","rollDamageType":"poison"} poison damage on a failed save
","rollAction":"Feed on Death"} temporary hit points.Golgari shamans are the spiritual leaders of the Golgari Swarm. They teach the guild's beliefs about the cycles of nature, using their necromantic magic to
Monsters
Waterdeep: Dungeon of the Mad Mage
, provided that it isn't in sunlight or running water. If he can't transform, he is destroyed.
While he has 0 hit points in mist form, he can't revert to his vampire form, and he must reach his resting place
the following night as a vampire spawn under Zorak's control.
Charm. Zorak targets one humanoid he can see within 30 feet of him. If the target can see Zorak, the target must succeed on a DC 17 Wisdom
Monsters
Baldur’s Gate: Descent into Avernus
Fear Aura. Any creature hostile to Bel that starts its turn within 20 feet of him must make a DC 23 Wisdom saving throw, unless Bel is incapacitated. Unless the save succeeds, the creature is
, mirror image, mislead, raise dead, teleport, wall of fire
1/day each: imprisonment, meteor swarm
Legendary Resistance (3/Day). If Bel fails a saving throw, he can choose to succeed instead.
Magic
Monsters
Tales from the Yawning Portal
with it, but nothing he's carrying does. He reverts to its true form if he dies.
Innate Spellcasting. He can innately cast the hold person spell at will, requiring no components, but his target must be
":"roll","rollAction":"Children of the Night"} swarm of bats;swarms of bats, provided that the sun isn't up. The called creatures arrive in 1d4;{"diceNotation":"1d4","rollType":"roll","rollAction
Monsters
The Book of Many Things
must succeed on a DC 18 Constitution saving throw or have the incapacitated condition until the start of its next turn, as the insects ravage its body.
Legendary Resistance (3/Day). If the champion
, the Grim Champion of Pestilence is nonetheless a fearsome entity of sickness and blight. A swarm of insects surrounds him in a mockery of a halo, and debilitating plagues flow from his fingertips
Monsters
Mythic Odysseys of Theros
":"Storm of Crows"}. The abhorrent overlord conjures a swarm of spectral crows and harpies in a 20-foot-radius sphere centered on a point the overlord can see within 120 feet of it. The sphere remains for 1
turn or starts its turn there must make a DC 15 Constitution saving throw. A creature takes 16 (3d10);{"diceNotation":"3d10","rollType":"damage","rollDamageType":"slashing"} slashing damage plus 16
Magic Items
The Wild Beyond the Witchlight
cauldron weighs 80 pounds when empty, and it can hold up to 100 gallons of liquid.
Attunement. Any Humanoid creature that attunes to the cauldron must succeed on a DC 15 Constitution saving throw or
. The iron cauldron has the following properties:
You can use an action to scream into the empty cauldron, which magically summons a swarm of bats that flies out of the cauldron and acts immediately
Monsters
Waterdeep: Dungeon of the Mad Mage
unconscious, provided that she isn't in sunlight or running water. If she can't transform, she is destroyed.
While she has 0 hit points in mist form, she can't revert to her vampire form, and she must reach
the ground rises the following night as a vampire spawn under Keresta's control.
Charm. Keresta targets one humanoid it can see within 30 feet of it. If the target can see Keresta, the target must
Monsters
Planescape: Adventures in the Multiverse
the darkweaver’s Shadow Web must make a DC 15 Wisdom saving throw. On a failed save, the creature has the frightened condition until the end of its next turn.
Shadow Step. If the darkweaver is in
cocoon contains the bones of a non-Humanoid creature, such as a flumph or a mule.
2
A swarm of insects that might be a darkweaver’s young
3
A corpse holding a jar of universal