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Swarm of Rats (Diseased Variant)

Monsters Tales from the Yawning Portal

large enough for a Tiny rat. The swarm can't regain hit points or gain temporary hit points.Bite. Melee Weapon Attack: +2;{"diceNotation":"1d20+2","rollType":"to hit","rollAction":"Bite"} to hit, reach

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

Swarm of Dretches

Monsters Monster Manual

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

Fetid Aura. Constitution Saving Throw: DC 12, any creature that starts its turn in a 10-foot Emanation originating from the swarm. Failure: The target has the Poisoned condition until the start of

Swarm of Rats

Monsters Monster Manual

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 rat. The swarm can’t regain Hit Points or gain

":"Bites", "rollDamageType":"Piercing"} Piercing damage, or 2 (1d4);{"diceNotation":"1d4", "rollType":"damage", "rollAction":"Bites", "rollDamageType":"Piercing"} Piercing damage if the swarm is Bloodied.Bludgeoning, Piercing, Slashing

Swarm of Venomous Snakes

Monsters Monster Manual

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 snake. The swarm can’t regain Hit Points or gain

the swarm is Bloodied—plus 10 (3d6);{"diceNotation":"3d6", "rollType":"damage", "rollAction":"Bites", "rollDamageType":"Poison"} Poison damage.Bludgeoning, Piercing, Slashing

Swarm of Bats

Monsters Monster Manual

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 bat. The swarm can’t regain Hit Points or gain

":"Bites", "rollDamageType":"Piercing"} Piercing damage, or 2 (1d4);{"diceNotation":"1d4", "rollType":"damage", "rollAction":"Bites", "rollDamageType":"Piercing"} Piercing damage if the swarm is Bloodied.Bludgeoning, Piercing, Slashing

Swarm of Lemures

Monsters Monster Manual

through an opening large enough for a Medium creature. The swarm can’t regain Hit Points or gain Temporary Hit Points.Multiattack. The swarm makes two Vile Slime attacks. Vile Slime. Melee

Hellish Restoration. If the swarm dies in the Nine Hells, it revives with all its Hit Points in 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Hellish Restoration"} days unless it is

Swarm of Larvae

Monsters Monster Manual

Swarm. The swarm can occupy another creature’s space and vice versa, and the swarm can move through an opening large enough for a Medium creature. The swarm can’t regain Hit Points or

gain Temporary Hit Points.Bites. Melee Attack Roll: +4;{"diceNotation":"1d20+4", "rollType":"to hit", "rollAction":"Bites"}, reach 5 ft. Hit: 9 (2d6 + 2);{"diceNotation":"2d6+2", "rollType":"damage

Swarm of Insects

Monsters Monster Manual

’s space and vice versa, and the swarm can move through any opening large enough for a Tiny insect. The swarm can’t regain Hit Points or gain Temporary Hit Points.Bites. Melee Attack Roll

Spider Climb. If the swarm has a Climb Speed, the swarm can climb difficult surfaces, including along ceilings, without needing to make an ability check. Swarm. The swarm can occupy another creature

Swarm of Ravens

Monsters Monster Manual

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 raven. The swarm can’t regain Hit Points or gain

", "rollAction":"Beaks", "rollDamageType":"Piercing"} Piercing damage, or 2 (1d4);{"diceNotation":"1d4", "rollType":"damage", "rollAction":"Beaks", "rollDamageType":"Piercing"} Piercing damage if the swarm is

Swarm of Piranhas

Monsters Monster Manual

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 piranha. The swarm can’t regain Hit Points or gain

Temporary Hit Points. Water Breathing. The swarm can breathe only underwater.Bites. Melee Attack Roll: +5 (with Advantage if the target doesn’t have all its Hit Points), reach 5 ft. Hit: 8 (2d4

Swarm of Crawling Claws

Monsters Monster Manual

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 creature. The swarm can’t regain Hit Points or gain

Temporary Hit Points.Swarm of Grasping Hands. Melee Attack Roll: +4;{"diceNotation":"1d20+4", "rollType":"to hit", "rollAction":"Swarm of Grasping Hands"}, reach 5 ft. Hit: 20 (4d8 + 2

Swarm of Gremishkas (DMR)

Monsters Dungeon Masters: Ravenloft Play-Along Pack

, and the swarm can move through any opening large enough for a Tiny creature. The swarm can’t regain Hit Points or gain Temporary Hit Points.Swarming Bites (Swarm Form Only). Melee Attack Roll

Magic Resistance. The gremishka has Advantage on saving throws against spells and other magical effects. Swarm (Swarm Form Only). The swarm can occupy another creature’s space and vice versa

Swarm of Zombie Limbs (DMR)

Monsters Dungeon Masters: Zombie Clot Play-Along Pack

Swarm. The swarm can occupy another creature’s space and vice versa, and it can move through any opening large enough for a Tiny chunk of flesh. The swarm can’t regain Hit Points or gain

"} Necrotic damage if the swarm is Bloodied, and the target has the Poisoned condition until the end of its next turn.The zombies of Ravenloft come in many monstrous forms. These Undead horrors befoul

Swarm of Cranium Rats Legacy

Monsters Volo's Guide to Monsters

, dominate monster 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 rat. The swarm can't regain hit points or gain

Illumination. As a bonus action, the swarm can shed dim light from its brains in a 5-foot radius, increase the illumination to bright light in a 5- to 20-foot radius (and dim light for an additional

Swarm of Rot Grubs Legacy

Monsters Volo's Guide to Monsters

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

Swarm of Infesting Insects

monsters

Swarm. The swarm can occupy another creature’s space and vice versa, and it can move through any opening large enough for a Tiny creature. The swarm can’t regain Hit Points or gain

damage if the swarm is Bloodied, and the target has the Poisoned condition. If the target remains Poisoned in this way after 1 hour, it is subjected to the following effect. Constitution Saving Throw: DC

Swarm of Rats Legacy

Monsters Basic Rules (2014)

large enough for a Tiny rat. The swarm can't regain hit points or gain temporary hit points.Bite. Melee Weapon Attack: +2;{"diceNotation":"1d20+2","rollType":"to hit","rollAction":"Bite"} to hit, reach

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

Swarm of Insects Legacy

Monsters Basic Rules (2014)

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 insect. The swarm can't regain hit points or gain temporary hit

","rollType":"damage","rollAction":"Bite","rollDamageType":"piercing"} piercing damage, or 5 (2d4);{"diceNotation":"2d4","rollType":"damage","rollAction":"Bite","rollDamageType":"piercing"} piercing damage if the swarm has half of its hit points or fewer.Bludgeoning, Piercing, Slashing

Skeletal Swarm

Monsters Ghosts of Saltmarsh

a Small humanoid. The swarm can't regain hit points or gain temporary hit points.Slash. Melee Weapon Attack: +4;{"diceNotation":"1d20+4","rollType":"to hit","rollAction":"Slash"} to hit, reach 0 ft

Deafening Clatter. Creatures are deafened while in the swarm's space. Swarm. The swarm can occupy another creature's space and vice versa, and the swarm can move through any opening large enough for

Swarm of Insects (Wasps) Legacy

Monsters Basic Rules (2014)

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 insect. The swarm can't regain hit points or gain temporary hit

","rollType":"damage","rollAction":"Bite","rollDamageType":"piercing"} piercing damage, or 5 (2d4);{"diceNotation":"2d4","rollType":"damage","rollAction":"Bite","rollDamageType":"piercing"} piercing damage if the swarm has half of its hit points or fewer.Bludgeoning, Piercing, Slashing

Swarm of Stirges

monsters Monster Manual

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 creature. The swarm can’t regain Hit Points or gain

Temporary Hit Points.Swarm of Proboscises. Melee Attack Roll: +5;{"diceNotation":"1d20+5", "rollType":"to hit", "rollAction":"Swarm of Proboscises"}, reach 5 ft. Hit: 14 (2d10 + 3);{"diceNotation

Swarm of Bats Legacy

Monsters Basic Rules (2014)

creature's space and vice versa, and the swarm can move through any opening large enough for a Tiny bat. The swarm can't regain hit points or gain temporary hit points.Bite. Melee Weapon Attack: +4

Echolocation. The swarm can't use its blindsight while deafened. Keen Hearing. The swarm has advantage on Wisdom (Perception) checks that rely on hearing. Swarm. The swarm can occupy another

Swarm of Insects (Beetles) Legacy

Monsters Basic Rules (2014)

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 insect. The swarm can't regain hit points or gain temporary hit

","rollType":"damage","rollAction":"Bite","rollDamageType":"piercing"} piercing damage, or 5 (2d4);{"diceNotation":"2d4","rollType":"damage","rollAction":"Bite","rollDamageType":"piercing"} piercing damage if the swarm has half of its hit points or fewer.Bludgeoning, Piercing, Slashing

Swarm of Quippers Legacy

Monsters Basic Rules (2014)

swarm can move through any opening large enough for a Tiny quipper. The swarm can't regain hit points or gain temporary hit points. Water Breathing. The swarm can breathe only underwater.Bite.. Melee

Blood Frenzy. The swarm has advantage on melee attack rolls against any creature that doesn't have all its hit points. Swarm. The swarm can occupy another creature's space and vice versa, and the

Swarm of Mechanical Spiders

Monsters Waterdeep: Dragon Heist

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 insect. The swarm can't regain hit points or gain temporary hit

points. Mechanical. The swarm is made up of Tiny constructs and doesn't require air, food, drink, or sleep.Bite. Melee Weapon Attack: +3;{"diceNotation":"1d20+3","rollType":"to hit","rollAction

Swarm of Ravens Legacy

Monsters Basic Rules (2014)

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 raven. The swarm can't regain hit points or gain temporary hit

","rollType":"damage","rollAction":"Beaks","rollDamageType":"piercing"} piercing damage, or 3 (1d6);{"diceNotation":"1d6","rollType":"damage","rollAction":"Beaks","rollDamageType":"piercing"} piercing damage if the swarm has half of its hit points or fewer.Bludgeoning, Piercing, Slashing

Swarm of Poisonous Snakes Legacy

Monsters Basic Rules (2014)

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 snake. The swarm can't regain hit points or gain temporary hit

the swarm has half of its hit points or fewer. The target must make a DC 10 Constitution saving throw, taking 14 (4d6);{"diceNotation":"4d6","rollType":"damage","rollAction":"Bite","rollDamageType

Swarm of Insects (Spiders) Legacy

Monsters Basic Rules (2014)

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 insect. The swarm can't regain hit points or gain temporary hit

points. Spider Climb. The swarm can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check. Web Sense. While in contact with a web, the swarm knows the

Sahuagin Hatchling Swarm

Monsters Ghosts of Saltmarsh

vice versa, and it can move through any opening large enough for a Tiny creature. The swarm can't regain hit points or gain temporary hit points. Water Breathing. The swarm can breathe only

Blood Frenzy. The swarm has advantage on melee attack rolls against any creature that doesn't have all its hit points. Seething. Once it enters combat, the swarm deals 10 slashing damage to itself at

Swarm of Insects (Centipedes) Legacy

Monsters Basic Rules (2014)

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 insect. The swarm can't regain hit points or gain temporary hit

the swarm has half of its hit points or fewer. A creature reduced to 0 hit points by a swarm of centipedes is stable but poisoned for 1 hour, even after regaining hit points, and paralyzed while poisoned in this way.Bludgeoning, Piercing, Slashing

Cranium Rat Squeaker Swarm

Monsters Planescape: Adventures in the Multiverse

vice versa, and the swarm can move through any opening large enough for a Tiny rat. The swarm can’t regain hit points or gain temporary hit points. Telepathic Shroud. The swarm is immune to any

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

Swarm of Ravenous Insects

monsters

another creature’s space and vice versa, and the swarm can move through any opening large enough for a Tiny creature. The swarm can’t regain Hit Points or gain Temporary Hit Points.Ravenous

Skeletonize. If the swarm starts its turn in the same space as a Large or smaller corpse, the corpse is destroyed, leaving behind only what it was wearing or carrying. Swarm. The swarm can occupy

Swarm of Animated Books

Monsters Candlekeep Mysteries

large enough for a 1-foot-tall, 8-inch-wide, 2-inch-thick object. The swarm can’t regain hit points or gain temporary hit points.Book Club. Melee Weapon Attack: +3;{"diceNotation":"1d20+3

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

Swarm of Gremishkas (Magical Allergy Transformation)

monsters

, and the swarm can move through any opening large enough for a Tiny creature. The swarm can’t regain Hit Points or gain Temporary Hit Points.Swarming Bites (Swarm Form Only). Melee Attack Roll

Magic Resistance. The gremishka has Advantage on saving throws against spells and other magical effects. Swarm (Swarm Form Only). The swarm can occupy another creature’s space and vice versa

Swarm of Gibberlings

Monsters Quests from the Infinite Staircase

another creature’s space and vice versa, and the swarm can move through any opening large enough to accommodate a Small gibberling. The swarm can’t regain hit points or gain temporary hit

Aversion to Fire. If the swarm takes fire damage, it has disadvantage on attack rolls and ability checks until the end of its next turn. Incessant Gibberish. Any non-gibberling that is within 60

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