concentration check

Darkmantle

Monsters Monster Manual

from itself, doing so with a successful DC 13 Strength (Athletics) check. On its turn, the darkmantle can detach itself by using 5 feet of movement. Darkness Aura (1/Day). Magical Darkness fills a 15

-foot Emanation originating from the darkmantle. This effect lasts while the darkmantle maintains Concentration on it, up to 10 minutes. Darkvision can’t penetrate this area, and no light can illuminate it.

Hunter's Mark

Spells Player’s Handbook

Advantage on any Wisdom (Perception or Survival) check you make to find it. If the target drops to 0 Hit Points before this spell ends, you can take a Bonus Action to move the mark to a new creature

you can see within range. Using a Higher-Level Spell Slot. Your Concentration can last longer with a spell slot of level 3–4 (up to 8 hours) or 5+ (up to 24 hours).

Adult Copper Dragon

Monsters Monster Manual

Concentration or Temporary Hit Points required to maintain the spell)1/Day Each: Greater Restoration, Major ImageLegendary Action Uses: 3 (4 in Lair). Immediately after another creature’s turn, the dragon

rolls 1d6;{"diceNotation":"1d6", "rollType":"roll", "rollAction":"Giggling Magic"} whenever it makes an ability check or attack roll and subtracts the number rolled from the D20 Test. Failure or

Ancient Copper Dragon

Monsters Monster Manual

Concentration or Temporary Hit Points required to maintain the spell)1/Day Each: Greater Restoration, Major Image, Project ImageLegendary Action Uses: 3 (4 in Lair). Immediately after another creature’s

turn, the target rolls 1d8;{"diceNotation":"1d8", "rollType":"roll", "rollAction":"Giggling Magic"} whenever it makes an ability check or attack roll and subtracts the number rolled from the D20 Test

Major Image

Spells Player’s Handbook

image can determine that it is an illusion with a successful Intelligence (Investigation) check against your spell save DC. If a creature discerns the illusion for what it is, the creature can see

through the image, and its other sensory qualities become faint to the creature. Using a Higher-Level Spell Slot. The spell lasts until dispelled, without requiring Concentration, if cast with a level 4+ spell slot.

Earthquake

Spells Player’s Handbook

the Prone condition, and its Concentration is broken. You can also cause the effects below. Fissures. A total of 1d6 fissures open in the spell’s area at the end of the turn you cast it. You

12d6 Bludgeoning damage, has the Prone condition, and is buried in the rubble, requiring a DC 20 Strength (Athletics) check as an action to escape. On a successful save, the creature takes half as much damage only.

Arch-hag

Monsters Monster Manual

(excluding the hag and its allies) within 1 mile of the lair subtract 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Lapsus Linguae"} from any ability check they make when they take the

, it also casts Confusion centered on itself. The spell uses the creature’s spellcasting ability and doesn’t require Concentration. If the arch-hag is destroyed or moves its lair elsewhere

Glyph of Warding

Spells Player’s Handbook

spell ends without being triggered. The glyph is nearly imperceptible and requires a successful Wisdom (Perception) check against your spell save DC to notice. When you inscribe the glyph, you set

creatures or creates harmful objects or traps, they appear as close as possible to the intruder and attack it. If the spell requires Concentration, it lasts until the end of its full duration. Using a Higher

Duergar Alchemist

Monsters Out of the Abyss

DC 10 Dexterity check to extinguish the flames. Invisibility (Recharges after a Short or Long Rest). The duergar magically turns invisible until it attacks, casts a spell, or uses its Enlarge, or

until its concentration is broken, up to 1 hour (as if concentrating on a spell). Any equipment the duergar wears or carries is invisible with it.Poison

Reduced-threat Darkmantle

Monsters Tales from the Yawning Portal

becomes 0, it can't benefit from any bonus to its speed, and it moves with the target. A creature can detach the darkmantle by making a successful DC 11 Strength check as an action. On its turn, the

corners. The darkness lasts as long as the darkmantle maintains concentration, up to 10 minutes (as if concentrating on a spell). Darkvision can't penetrate this darkness, and no natural light can

Infernal Calling

Spells Xanathar's Guide to Everything

, you must make a Charisma (Deception, Intimidation, or Persuasion) check contested by its Wisdom (Insight) check. You make the check with advantage if you say the devil’s true name. If your check

fails, the devil becomes immune to your verbal commands for the duration of the spell, though it can still carry out your commands if it chooses. If your check succeeds, the devil carries out your

Alkilith

Monsters Mordenkainen Presents: Monsters of the Multiverse

combat, it has advantage on its initiative roll. Moreover, if a creature hasn’t observed the alkilith move or act, that creature must succeed on a DC 18 Intelligence (Investigation) check to discern

saving throw, or it hears a faint buzzing in its head for a moment and has disadvantage on its next attack roll, saving throw, or ability check. If the saving throw against Foment Confusion fails by 5

Harp of Gilded Plenty

Magic Items Bigby Presents: Glory of the Giants

speaking, singing, and playing by itself. Whenever you attempt to attune to the harp, you must first make either a DC 15 Charisma (Performance) check or a DC 20 Charisma (Persuasion) check to convince the

harp resizes to suit you. Stalwart Song. Whenever you make a Charisma check while attuned to the harp, you can treat a roll of 9 or lower on the die as a 10. Feast of Plenty. If you spend 10 minutes

Hag of the Fetid Gaze

Monsters Candlekeep Mysteries

imitations with a successful DC 14 Wisdom (Insight) check. Shared Spellcasting. While all three members of the Fetid Gaze are within 30 feet of one another, they can each cast the following spells from

succeed on a DC 20 Intelligence (Investigation) check to discern that the hag is disguised. Invisible Passage. The hag magically turns invisible until she attacks or casts a spell, or until her

Dabus

Monsters Planescape: Adventures in the Multiverse

pictures that float in the air in front of itself and disappear a few seconds later. A creature that can see such a message can decipher it with a successful DC 10 Intelligence (Investigation) check

minute or if the dabus’s concentration ends (as if concentrating on a spell).Among the bustling throngs of Sigil’s streets float gray-skinned, vaguely humanlike figures with curled horns

Will-o'-Wisp (Variant)

Monsters The Wild Beyond the Witchlight

", "rollDamageType":"lightning"} lightning damage. Invisibility. The will-o’-wisp and its light magically become invisible until it attacks or uses its Consume Life, or until its concentration ends

check, attack roll, or saving throw made by it. No creature can have more than one of these magic boons at a time.Lightning, PoisonAcid, Cold, Fire, Necrotic, Thunder; Bludgeoning, Piercing, and Slashing from Nonmagical Attacks

Zaratan

Monsters Mordenkainen Presents: Monsters of the Multiverse

’s concentration is broken. The shock wave deals 100 thunder damage to all structures in contact with the ground in the area. If a creature is near a structure that collapses, the creature

successful DC 20 Strength (Athletics) check as an action to escape. Another creature within 5 feet of the buried creature can use its action to clear rubble and grant advantage on the check. If three

Githzerai Anarch

Monsters Mordenkainen Presents: Monsters of the Multiverse

creation spell (as a 9th-level spell) using the unformed substance of Limbo instead of shadow material. If used in Limbo, the object remains until the anarch’s concentration is broken, regardless

of its composition. If the anarch moves more than 120 feet from the object, the anarch’s concentration breaks. Move Object. The anarch can magically move an object it can see within 150 feet of

Reduced-threat Aboleth

Monsters Tales from the Yawning Portal

and only at the end of another creature's turn. The aboleth regains spent legendary actions at the start of its turn. Detect. The aboleth makes a Wisdom (Perception) check. Tail Swipe. The aboleth

casts phantasmal force (no components required) on any number of creatures it can see within 60 feet of it. While maintaining concentration on this effect, the aboleth can’t take other lair actions

Space Clown

Monsters Spelljammer: Adventures in Space

requires the clown’s concentration (as if concentrating on a spell), and the illusion fails to hold up to physical inspection. As an action, a creature that can see the clown’s illusory form can

make a DC 15 Wisdom (Insight) check, piercing the illusion and discerning the clown’s true form on a success.

Shield of the Uven Rune

Magic Items Waterdeep: Dungeon of the Mad Mage

) check recognizes it as an uven (“enemy” in Giant) rune that confers great power. While holding the shield, you benefit from the following properties. Winter’s Friend. You are immune to

the shield (save DC 17). The spell does not require concentration and lasts for 1 minute. Once you cast the spell from the shield, you can’t do so again until you finish a short or long rest

Elder Brain

Monsters Mordenkainen Presents: Monsters of the Multiverse

of another creature’s turn. The elder brain regains spent legendary actions at the start of its turn. Break Concentration. The elder brain targets one creature within 120 feet of it with which

it has a psychic link. The elder brain breaks the creature’s concentration on a spell it has cast. The creature also takes 2 (1d4);{"diceNotation":"1d4","rollType":"damage","rollAction":"Break

Scion of Surtur

Monsters Bigby Presents: Glory of the Giants

being embedded in hardening rock. A creature can make a DC 25 Strength (Athletics) check as an action, freeing itself or a creature within reach from the rock on a success. The rock has AC 17 and 40 hit

concentrating must succeed on a DC 26 Constitution saving throw or lose concentration. Incendiary Smoke. The scion causes smoke and white-hot embers to billow from its skin, filling a 30-foot-radius sphere

Nafas

Monsters Quests from the Infinite Staircase

lasts as long as Nafas maintains concentration (as if concentrating on a spell). When the vortex appears, each creature other than Nafas in the vortex’s area must make a DC 22 Strength saving throw

with it. A creature restrained by the vortex, or another creature that can reach it, can use its action to make a DC 22 Strength check. On a successful check, the restrained creature is no longer

Hunter's Mark Legacy

Spells Basic Rules (2014)

you have advantage on any Wisdom (Perception) or Wisdom (Survival) check you make to find it. If the target drops to 0 hit points before this spell ends, you can use a bonus action on a subsequent turn

of yours to mark a new creature. At Higher Levels. When you cast this spell using a spell slot of 3rd or 4th level, you can maintain your concentration on the spell for up to 8 hours. When you use a spell slot of 5th level or higher, you can maintain your concentration on the spell for up to 24 hours.

Djinni Legacy

Monsters Basic Rules (2014)

within 120 feet of it. The whirlwind lasts as long as the djinni maintains concentration (as if concentrating on a spell). Any creature but the djinni that enters the whirlwind must succeed on a DC 18

loses sight of it. A creature can use its action to free a creature restrained by the whirlwind, including itself, by succeeding on a DC 18 Strength check. If the check succeeds, the creature is no longer restrained and moves to the nearest space outside the whirlwind.Lightning, Thunder

Darkmantle Legacy

Monsters Basic Rules (2014)

moves with the target. A creature can detach the darkmantle by making a successful DC 13 Strength check as an action. On its turn, the darkmantle can detach itself from the target by using 5 feet of

maintains concentration, up to 10 minutes (as if concentrating on a spell). Darkvision can’t penetrate this darkness, and no natural light can illuminate it. If any of the darkness overlaps with an area of light created by a spell of 2nd level or lower, the spell creating the light is dispelled.

Green Hag (Coven Variant) Legacy

Monsters Monster Manual (2014)

with a successful DC 14 Wisdom (Insight) check. Shared Spellcasting. While all three members of a hag coven are within 30 feet of one another, they can each cast the following spells from the wizard

succeed on a DC 20 Intelligence (Investigation) check to discern that the hag is disguised. Invisible Passage. The hag magically turns invisible until she attacks or casts a spell, or until her

Green Hag Legacy

Monsters Basic Rules (2014)

to visually inspect the illusion and succeed on a DC 20 Intelligence (Investigation) check to discern that the hag is disguised. Invisible Passage. The hag magically turns invisible until she

attacks or casts a spell, or until her concentration ends (as if concentrating on a spell). While invisible, she leaves no physical evidence of her passage, so she can be tracked only by magic. Any equipment she wears or carries is invisible with her.

Alkilith Legacy

Monsters Mordenkainen’s Tome of Foes

a moment and has disadvantage on its next attack roll, saving throw, or ability check. If the saving throw against Foment Madness fails by 5 or more, the creature is instead subjected to the

confusion spell for 1 minute (no concentration required by the alkilith). While under the effect of that confusion, the creature is immune to Foment Madness. Magic Resistance. The alkilith has advantage on

Supernal Smite

spells

":"Supernal Smite", "rollDamageType":"Force"} damage from the attack. If the creature is concentrating on a spell, that Concentration is broken. In addition, each ongoing spell of level 3 or lower on the

target ends. For each ongoing spell of level 4 or higher on the target, make an ability check using your spellcasting ability (DC 10 plus that spell’s level). On a successful check, the spell ends.

Elder Brain Legacy

Monsters Volo's Guide to Monsters

that loom large in its mind (including things the target worries about, loves, or hates). The elder brain can also make a Charisma (Deception) check with advantage to deceive the target’s mind

into thinking it believes one idea or feels a particular emotion. The target contests this attempt with a Wisdom (Insight) check. If the elder brain succeeds, the mind believes the deception for 1 hour

Githzerai Anarch Legacy

Monsters Mordenkainen’s Tome of Foes

composition. If the anarch moves more than 120 feet from the object, its concentration breaks. The anarch can magically move an object it can see within 150 feet of it by making a Wisdom check with

spell (as a 9th-level spell) using the unformed substance of Limbo instead of shadow material. If used in Limbo, the object remains until the anarch’s concentration is broken, regardless of its

Aboleth Legacy

Monsters Basic Rules (2014)

aboleth regains spent legendary actions at the start of its turn. Detect. The aboleth makes a Wisdom (Perception) check. Tail Swipe. The aboleth makes one tail attack. Psychic Drain (Costs 2

of creatures it can see within 60 feet of it. While maintaining concentration on this effect, the aboleth can’t take other lair actions. If a target succeeds on the saving throw or if the effect

Major Image Legacy

Spells Basic Rules (2014)

with a successful Intelligence (Investigation) check against your spell save DC. If a creature discerns the illusion for what it is, the creature can see through the image, and its other sensory

qualities become faint to the creature. At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the spell lasts until dispelled, without requiring your concentration.

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