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Returning 35 results for 'monster swarm with once arcane from for long'.
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Magic Items
Dungeon Master’s Guide
24 hours. On a failed save, the swarm is swayed by the pipes’ music and becomes Friendly to you and your allies for as long as you continue to play the pipes each round as a Magic action. A
regain 1d3 expended charges daily at dawn. If you play the pipes as a Magic action, you can take a Bonus Action to expend 1 to 3 charges, calling forth one Swarm of Rats with each expended charge if
Magic Items
Dungeon Master’s Guide
its normal casting time, and you can’t use this property again until you finish a Short or Long Rest. On a failed check, you fail to cast the spell and a random effect occurs instead
just happened.
56–60
A harmless swarm of butterflies fills a 10-foot Cube within 30 feet of yourself. The swarm disperses after 1 minute.
61–65
You pull a nonmagical object
Monsters
Monster Manual
with spell attacks):
At Will: Detect Magic, Hold Monster, Ice Knife, Shapechange (Beast or Humanoid form only, no Temporary Hit Points gained from the spell, and no Concentration or Temporary Hit
use to take one of the following actions. The dragon regains all expended uses at the start of each of its turns.
Chill. The dragon uses Spellcasting to cast Hold Monster. The dragon can’t take
Monsters
Monster Manual
uses Spellcasting to cast Hold Monster. The dragon can’t take this action again until the start of its next turn.
Cold Gale. Dexterity Saving Throw: DC 23, each creature in a 60-foot-long, 10
":"Spellcasting"} to hit with spell attacks):
At Will: Detect Magic, Hold Monster, Ice Knife (level 2 version), Shapechange (Beast or Humanoid form only, no Temporary Hit Points gained from the spell, and
Monsters
Monster Manual
":"Slashing"} Slashing damage.
Roar (3/Day). The sphinx emits a magical roar. Whenever it roars, the roar has a different effect, as detailed below (the sequence resets when it takes a Long Rest):
First
actions. The sphinx regains all expended uses at the start of each of its turns.
Arcane Prowl. The sphinx can teleport up to 30 feet to an unoccupied space it can see, and it makes one Claw attack
Monsters
Monster Manual
Advantage on saving throws against spells and other magical effects.
Siege Monster. The colossus deals double damage to objects and structures.Multiattack. The colossus makes three attacks, using Slam or
"}. Dexterity Saving Throw: DC 26, each creature in a 300-foot-long, 10-foot-wide Line. Failure: 65 (10d12);{"diceNotation":"10d12", "rollType":"damage", "rollAction":"Divine Beam", "rollDamageType
Spells
Player’s Handbook
sealed by the Arcane Lock spell. In addition, you can cover up to ten doors with an illusion to make them appear as plain sections of wall.
Stairs. Webs fill all stairs in the warded area from top to
area:
Dancing Lights in four corridors, with a simple program that the lights repeat as long as Guards and Wards lasts
Magic Mouth in two locations
Stinking Cloud in two locations (the vapors
Magic Items
Dungeon Master’s Guide
stone cracks and turns to powder if the book rests on it long enough.
Whenever a creature that isn’t a Fiend or an Undead attunes to the Book of Vile Darkness, that creature makes a DC 17
remains with you only as long as you strive to work evil in the world. If you fail to perform at least one evil act within the span of 10 days, or if you willingly perform a good act, the book
Magic Items
Stranger Things: Welcome to the Hellfire Club
If you play these pipes as a Magic action, you summon one Swarm of Corrupted Rats in an unoccupied space within 60 feet of yourself. The swarm is Friendly to you and your allies for as long as you
continue to play the pipes each round as a Magic action. While Friendly, the swarm is under your control, obeys your commands, and takes no action other than to defend itself if you issue it no commands
Monsters
Forgotten Realms: Adventures in Faerûn
Magic Resistance. Manshoon has Advantage on saving throws against spells and other magical effects.Multiattack. Manshoon makes three Arcane Burst attacks. He can replace two attacks with a use of
Spellcasting.
Arcane Burst. Melee or Ranged Attack Roll: +11;{"diceNotation":"1d20+11", "rollType":"to hit", "rollAction":"Arcane Burst"}, reach 5 ft., or range 120 ft. Hit: 32 (4d12 + 6);{"diceNotation
Monsters
Forgotten Realms: Adventures in Faerûn
minute, it succeeds automatically.Curious and self-confident, young spirit dragons can cause trouble for a region’s other denizens, by either unleashing long-buried evils or misusing scarcely
artificers.
3
Jhaamdath, a prehistoric psiocracy.
4
Myth Drannor, a legendary city of magic.
5
Netheril, an empire of arcane secrets.
6
Ostoria, the first kingdom of the giants
Feats
Eberron: Forge of the Artificer
each spell once without a spell slot, and you regain the ability to cast it in that way when you finish a Long Rest.
You can also cast these spells using any spell slots you have of the appropriate
level. Intelligence, Wisdom, or Charisma is your spellcasting ability for these spells (choose when you select this feat).
When you reach character level 3, you also always have the Arcane Lock spell
Swarm of Cranium Rats
Legacy
This doesn't reflect the latest rules and lore.
Learn More
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
Feats
Eberron: Forge of the Artificer
you finish a Long Rest. You can also cast these spells using any spell slots you have of the appropriate level. Intelligence, Wisdom, or Charisma is your spellcasting ability for these spells (choose
Evil and Good, Identify
2
Detect Thoughts, Find Traps
3
Clairvoyance, Nondetection
4
Arcane Eye, Divination
5
Legend Lore
Feats
Eberron: Forge of the Artificer
, and you regain the ability to cast it in that way when you finish a Long Rest. You can also cast it using any spell slots you have of the appropriate level. Intelligence, Wisdom, or Charisma is your
Spell Level
Spells
1
False Life, Healing Word
2
Arcane Vigor, Prayer of Healing
3
Aura of Vitality, Mass Healing Word
4
Aura of Life, Aura of Purity
5
Greater Restoration
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
breaks open on impact. A swarm of rot grubs emerges from the shattered pot and remains a hazard in that square.
Scorpion on a Stick. The kobold makes a melee attack with a scorpion (see the Monster
Pipes of the Sewers
Legacy
This doesn't reflect the latest rules and lore.
Learn More
Magic Items
Basic Rules (2014)
long as you continue to play the pipes each round as an action. A friendly swarm obeys your commands. If you issue no commands to a friendly swarm, it defends itself but otherwise takes no actions. If
unless you threaten or harm them.
The pipes have 3 charges. If you play the pipes as an action, you can use a bonus action to expend 1 to 3 charges, calling forth one swarm of rats with each expended
Monsters
Eberron: Rising from the Last War
following spells, requiring no components:
At will: arcane eye
3/day each: clairvoyance, confusion, dream, eyebite
Magic Resistance. The quori has advantage on saving throws against spells and other
magical effects.Multiattack. The quori makes two Soul Binding attacks. Alternatively, it can make four attacks with Arcane Blast.
Arcane Blast. Ranged Spell Attack: +13;{"diceNotation":"1d20+13
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
Classes
Tasha’s Cauldron of Everything
into the swarm, instead of a cloud of mist, or the arcane eye spell could create an extension of your swarm that spies for you. Such descriptions don’t change the effects of spells, but they are
Feeling a deep connection to the environment around them, some rangers reach out through their magical connection to the world and bond with a swarm of nature spirits. The swarm becomes a potent
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
Mordenkainen Presents: Monsters of the Multiverse
constituents. The rats become smarter as a result, and retain their heightened intelligence for as long as the swarm persists. The swarm also awakens latent psionic abilities implanted within each cranium
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
Equipment
against giant insects or the vile swarm of insects;swarms of insects described in appendix A of the Monster Manual.
A gourd or vial of salve, which sells for 1 gp, contains 20 applications of
Monsters
Van Richten’s Guide to Ravenloft
Limited Spell Immunity. The swarm automatically succeeds on saving throws against spells of 3rd level or lower, and the attack rolls of such spells always miss it.
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 gremishka. The swarm can’t regain hit points or gain temporary hit points.Bites. Melee
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 maggot. The swarm can’t regain hit points or gain
temporary hit points.Infestation. Melee Weapon Attack: +3;{"diceNotation":"1d20+3","rollType":"to hit","rollAction":"Infestation"} to hit, reach 0 ft., one target in the swarm’s space. Hit: 10
Monsters
Mordenkainen Presents: Monsters of the Multiverse
their heightened intelligence for as long as the swarm persists. The swarm also awakens latent psionic abilities implanted within each cranium rat by its mind flayer creators, bestowing upon the swarm
rats come together to form a swarm, they merge their minds into a single intelligence with the accumulated memories of all the swarm’s constituents. The rats become smarter as a result, and retain
Monsters
Mordenkainen Presents: Monsters of the Multiverse
Multiattack. The necromancer makes three Arcane Burst attacks.
Arcane Burst. Melee or Ranged Spell Attack: +7;{"diceNotation":"1d20+7", "rollType":"to hit", "rollAction":"Arcane Burst"} to hit
, reach 5 ft. or range 120 ft., one target. Hit: 25 (4d10 + 3);{"diceNotation":"4d10+3", "rollType":"damage", "rollAction":"Arcane Burst", "rollDamageType":"necrotic"} necrotic damage.
Spellcasting. The
Classes
Tasha’s Cauldron of Everything
into the swarm, instead of a cloud of mist, or the arcane eye spell could create an extension of your swarm that spies for you. Such descriptions don’t change the effects of spells, but they are
Feeling a deep connection to the environment around them, some rangers reach out through their magical connection to the world and bond with a swarm of nature spirits. The swarm becomes a potent
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
Quests from the Infinite Staircase
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
feet of the swarm and doesn’t have the deafened condition has disadvantage on Constitution saving throws to maintain concentration on spells and similar effects.
Swarm. The swarm can occupy
Monsters
Mordenkainen Presents: Monsters of the Multiverse
Multiattack. The conjurer makes three Arcane Burst attacks.
Arcane Burst. Melee or Ranged Spell Attack: +6;{"diceNotation":"1d20+6", "rollType":"to hit", "rollAction":"Arcane Burst"} to hit, reach 5
ft. or range 120 ft., one target. Hit: 19 (3d10 + 3);{"diceNotation":"3d10+3", "rollType":"damage", "rollAction":"Arcane Burst", "rollDamageType":"force"} force damage.
Spellcasting. The conjurer
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
", "rollType":"damage", "rollAction":"Swarm of Meteors", "rollDamageType":"fire"} fire damage and 35 (10d6);{"diceNotation":"10d6", "rollType":"damage", "rollAction":"Swarm of Meteors", "rollDamageType
Monsters
Phandelver and Below: The Shattered Obelisk
Magic Resistance. Oshundo has advantage on saving throws against spells and other magical effects.Multiattack. Oshundo makes two Chilling Grasp or Arcane Bolt attacks.
Chilling Grasp. Melee Spell
Grasp", "rollDamageType":"cold"} cold damage, and Oshundo regains 14 hit points if the target is a creature.
Arcane Bolt. Ranged Spell Attack: +8;{"diceNotation":"1d20+8", "rollType":"spell
Monsters
Eberron: Rising from the Last War
","rollAction":"Magic Staff","rollDamageType":"force"} force damage.
Arcane Cataclysm (Recharges after a Long Rest). Sul Khatesh conjures orbs of magical energy that plummet to the ground at three
each: chain lightning, create undead, dream, hold monster, mass suggestion, scrying
1/day each: foresight, gate, power word kill, teleport
Legendary Resistance (3/Day). If Sul Khatesh fails a saving
Monsters
Van Richten’s Guide to Ravenloft
","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
overwhelm—or just get a bite of.
Gremishkas have an unstable relationship with magic. Spells cast near a gremishka might rebound onto those nearby or cause the monster to explode, its scaly chunks