chance check

Bag of Devouring

Magic Items Dungeon Master’s Guide

someone reaches inside it, there is a 50 percent chance that the creature is pulled inside the bag. A creature inside the bag can take an action to try to escape, doing so with a successful DC 15

Strength (Athletics) check. Another creature can take an action to reach into the bag to pull a creature out, doing so with a successful DC 20 Strength (Athletics) check, provided the puller isn’t

Control Water

Spells Player’s Handbook

Huge or smaller vehicles struck by the wave have a 25 percent chance of capsizing. The water level remains elevated until the spell ends or you choose a different effect. If this effect produced a wave

takes 2d8 Bludgeoning damage. On a successful save, the creature takes half as much damage. A creature can swim away from the whirlpool only if it first takes an action to pull away and succeeds on a Strength (Athletics) check against your spell save DC.

Tree Blight

Monsters Curse of Strahd

succeed on a DC 18 Intelligence (Investigation) check to discern that the blight is animate. Siege Monster. The blight deals double damage to objects and structures.Multiattack. The blight makes one

cutting them causes the blight no harm. Blight Animosity. A tree blight will often fight alongside other kinds of blights, but it hates other tree blights and will attack them given the chance. Tree

Encephalon Gemmule

Monsters Phandelver and Below: The Shattered Obelisk

chance to mutate into what is known as an encephalon cluster—a ravenous, slimy, psionic, brain-shaped mass that spawns horrors called encephalon gemmules.PsychicLeech. The gemmule targets one

’t use Leech again until it detaches. It can detach itself by spending 5 feet of its movement. As an action, the target or a creature within 5 feet of the target can detach the gemmule by succeeding on a DC 15 Strength check.

Leprechaun

Monsters Quests from the Infinite Staircase

leprechaun the chance to partake in merriment or revelry such as a song, a dance, or a good meal, the leprechaun must succeed on a DC 15 Wisdom saving throw or have the charmed condition for 24 hours. While

, Phantasmal Force 1/day each: Fabricate (as an action), MisleadAstonishing Luck. When the leprechaun fails an ability check, an attack roll, or a saving throw, it can roll a new d20 and choose which

Yan-C-Bin

Monsters Princes of the Apocalypse

(Athletics) check. Thunderstorms erupt in a 5-mile radius centered on Yan-C-Bin’s lair, creating deafening cracks of thunder and constant lightning. Every ten minutes the storm rages, creatures standing

beneath the open sky have a five percent;{"diceNotation":"1d100","rollType":"roll","rollAction":"Thunderstorm Chance"} chance of being struck by lightning. A creature struck by lightning must make a

Giff (Gunpowder Keg Variant)

Monsters Mordenkainen Presents: Monsters of the Multiverse

. Every other keg of gunpowder within 20 feet of an exploding keg has a 50 percent chance of also exploding. Check each keg only once per turn, no matter how many other kegs explode around it.

Kobold Inventor

Monsters Mordenkainen Presents: Monsters of the Multiverse

turns. The target can end this damage by using its action to make a DC 10 Dexterity check to extinguish the flames. Basket of Centipedes. The kobold throws a small basket into a 5-foot-square space

’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

Stalagma Steelshadow

Monsters Waterdeep: Dungeon of the Mad Mage

) check. Tail Attack. The dragon makes a tail attack. Wing Attack (Costs 2 Actions). The dragon beats its wings. Each creature within 10 feet of the dragon must succeed on a DC 21 Dexterity saving

flames, such as lanterns, have a 50 percent chance of being extinguished. Regional Effects The region containing a legendary Steel dragon’s lair is warped by the dragon’s magic, which

Living Loot Satchel

Magic Items Acquisitions Incorporated

transfer any amount of your franchise funds back to your satchel with a successful DC 15 Dexterity (Sleight of Hand) check. Secret Satchel As a rank 3 hoardsperson, your living loot satchel gets an

you really don’t want to know about, there is no chance for the spell to end. That Thing You Need At rank 3, you can use a bonus action to reach into your living loot satchel and make a DC 15

Demogorgon

Monsters Mordenkainen Presents: Monsters of the Multiverse

hitting him with an attack), there is a 50 percent chance that the illusory duplicate is affected, not Demogorgon, in which case the illusion disappears. Regional Effects The region containing Demogorgon

normally docile. Within that area, any ability check involving Animal Handling has disadvantage. Venomous Beasts. The area within 6 miles of the lair becomes overpopulated with poisonous snake

Darkweaver

Monsters Planescape: Adventures in the Multiverse

can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check. Sunlight Hypersensitivity. The darkweaver takes 10 radiant damage when it starts its turn

A darkweaver’s web has a 50 percent;{"diceNotation":"1d100","rollType":"roll","rollAction":"Darkweaver Webs"} chance of having 1d6;{"diceNotation":"1d6", "rollType":"roll", "rollAction

Emerald Dragon Wyrmling

Monsters Fizban's Treasury of Dragons

makes an attack roll or an ability check, it must roll a d4;{"diceNotation":"1d4", "rollType":"roll", "rollAction":"Disorienting Breath"} and reduce the total by the number rolled. On a successful save

is a magic in the retelling of stories. Each new teller adds a bit of themself to the spell. (Any) 4 Nurture. Rearing a child is our best chance to make sure our own stories are passed on. (Any

Young Emerald Dragon

Monsters Fizban's Treasury of Dragons

", "rollAction":"Disorienting Breath", "rollDamageType":"psychic"} psychic damage, and until the end of its next turn, when the creature makes an attack roll or an ability check, it must roll a d6

. There is a magic in the retelling of stories. Each new teller adds a bit of themself to the spell. (Any) 4 Nurture. Rearing a child is our best chance to make sure our own stories are passed on

Mighty Servant of Leuk-o

Magic Items Tasha’s Cauldron of Everything

. While crew members are attuning themselves, any creature or structure outside and within 50 feet of the servant has a 25 percent chance of being accidentally targeted by one of its Destructive Fist

creatures can open the hatch as easily as any other door. Other creatures can open the hatch as an action with a successful DC 25 Dexterity check using thieves’ tools. A knock spell cast on the

Adult Emerald Dragon

Monsters Fizban's Treasury of Dragons

creature makes an attack roll or an ability check, it must roll a d6;{"diceNotation":"1d6", "rollType":"roll", "rollAction":"Disorienting Breath"} and reduce the total by the number rolled. On a

in the retelling of stories. Each new teller adds a bit of themself to the spell. (Any) 4 Nurture. Rearing a child is our best chance to make sure our own stories are passed on. (Any) 5

Ancient Emerald Dragon

Monsters Fizban's Treasury of Dragons

roll or an ability check, it must roll a d8;{"diceNotation":"1d8", "rollType":"roll", "rollAction":"Disorienting Breath"} and reduce the total by the number rolled. On a successful save, the creature

retelling of stories. Each new teller adds a bit of themself to the spell. (Any) 4 Nurture. Rearing a child is our best chance to make sure our own stories are passed on. (Any) 5 Inquisitiveness

Nycaloth (summoner variant) Legacy

Monsters Monster Manual (2014)

);{"diceNotation":"2d4","rollType":"roll","rollAction":"Claw"}. Any creature can take an action to stanch the wound with a successful DC 13 Wisdom (Medicine) check. The wound also closes if the target receives

","rollAction":"Summon Yugoloth"} chance of summoning 1d4;{"diceNotation":"1d4","rollType":"roll"} mezzoloth;mezzoloths or one nycaloth. A summoned yugoloth appears in an unoccupied space within 60 feet

Bearded Devil (Summoner Variant) Legacy

Monsters Monster Manual (2014)

":"Glaive"}. Any creature can take an action to stanch the wound with a successful DC 12 Wisdom (Medicine) check. The wound also closes if the target receives magical healing. Summon Devil (1/Day). The

devil chooses what to summon and attempts a magical summoning. A bearded devil has a 30 percent;{"diceNotation":"1d100","rollType":"roll","rollAction":"Summon Devil"} chance of summoning one bearded

Fate Gambler

feats

Coming out ahead, whether in games of chance or in life-or-death contention, fills you with resolve and vigor. You gain the following benefits. Bet Big. If you don't already have it, you gain Heroic

Inspiration whenever you succeed on an ability check made against another creature, when you reduce a creature to 0 Hit Points, or when a creature fails a saving throw you forced it to make. If, in

Yochlol (Summoner Variant) Legacy

Monsters Monster Manual (2014)

. Spider Climb. The yochlol can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check. Innate Spellcasting. The yochlol’s spellcasting ability is

has a 50 percent;{"diceNotation":"1d100","rollType":"roll","rollAction":"Summon Demon"} chance of summoning one yochlol. A summoned demon appears in an unoccupied space within 60 feet of its

Horned Devil (Summoner Variant) Legacy

Monsters Monster Manual (2014)

increases by 10 (3d6);{"diceNotation":"3d6","rollType":"roll","rollAction":"Tail"}. Any creature can take an action to stanch the wound with a successful DC 12 Wisdom (Medicine) check. The wound also

. Summon Devil (1/Day). The devil chooses what to summon and attempts a magical summoning. A horned devil has a 30 percent;{"diceNotation":"1d100","rollType":"roll","rollAction":"Summon Devil"} chance

Kobold Inventor Legacy

Monsters Volo's Guide to Monsters

":"damage","rollDamageType":"fire"} fire damage at the start of each of the target’s turns. A creature can end this damage by using its action to make a DC 10 Dexterity check to extinguish the

initiative. At the end of each of the swarm’s turns, there’s a 50 percent;{"diceNotation":"1d100","rollType":"roll","rollAction":"Dispersal"} chance that the swarm disperses. Green Slime Pot

Ancient Silver Dragon Legacy

Monsters Basic Rules (2014)

) check. Tail Attack. The dragon makes a tail attack. Wing Attack (Costs 2 Actions). The dragon beats its wings. Each creature within 15 feet of the dragon must succeed on a DC 25 Dexterity saving throw

, and unprotected flames are extinguished. Protected flames, such as lanterns, have a 50 percent chance of being extinguished. Regional Effects The region containing a legendary silver dragon&rsquo

Ancient Brass Dragon Legacy

Monsters Basic Rules (2014)

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

, have a 50 percent chance of being extinguished. A cloud of sand swirls about in a 20-foot-radius sphere centered on a point the dragon can see within 120 feet of it. The cloud spreads around corners

Adult Brass Dragon Legacy

Monsters Basic Rules (2014)

creature's turn. The dragon regains spent legendary actions at the start of its turn. Detect. The dragon makes a Wisdom (Perception) check. Tail Attack. The dragon makes a tail attack. Wing Attack

the dragon and knocked prone. Gases and vapors are dispersed by the wind, and unprotected flames are extinguished. Protected flames, such as lanterns, have a 50 percent chance of being extinguished

Control Water Legacy

Spells Basic Rules (2014)

and then crashes down. Any Huge or smaller vehicles in the wave's path are carried with it to the other side. Any Huge or smaller vehicles struck by the wave have a 25 percent chance of capsizing

Strength (Athletics) check against your spell save DC. When a creature enters the vortex for the first time on a turn or starts its turn there, it must make a Strength saving throw. On a failed save

Adult Silver Dragon Legacy

Monsters Basic Rules (2014)

option can be used at a time and only at the end of another creature's turn. The dragon regains spent legendary actions at the start of its turn. Detect. The dragon makes a Wisdom (Perception) check

unprotected flames are extinguished. Protected flames, such as lanterns, have a 50 percent chance of being extinguished. Regional Effects The region containing a legendary silver dragon’s lair

Giff Legacy

Monsters Mordenkainen’s Tome of Foes

much damage and isn’t knocked prone. Every other keg of gunpowder within 20 feet of an exploding keg has a 50 percent chance of also exploding. Check each keg only once per turn, no matter how many other kegs explode around it.

The Infernal Machine of Lum the Mad

Magic Items Infernal Machine Rebuild

the complex nature of its programming, this feature can be used only once per month. Each time this effect is used, there is a cumulative 10 percent chance of the Infernal Machine malfunctioning

, necessitating seven days’ worth of repairs and reprogramming, as well as the expenditure of 500 gp in parts, before it can be used again. When these repairs are done, the cumulative chance of

Difficulty Class

Compendium - Sources->Dungeons & Dragons->Dungeon Master’s Guide

task with little chance of failure. Unless circumstances are unusual, let characters succeed at such a task without making a check. Easy, Moderate, and Hard. These are the most common difficulties

Difficulty Class You establish the Difficulty Class for an ability check or a saving throw when a rule or an adventure doesn’t give you one. Choose a DC from the Typical DCs table based on the task’s

Ability Checks

Compendium - Sources->Dungeons & Dragons->Basic Rules (2014)

attempts an action (other than an attack) that has a chance of failure. When the outcome is uncertain, the dice determine the results. For every ability check, the DM decides which of the six abilities is

Ability Checks An ability check tests a character's or monster's innate talent and training in an effort to overcome a challenge. The DM calls for an ability check when a character or monster

Wisdom

Compendium - Sources->Dungeons & Dragons->Basic Rules (2014)

room, looking at the walls and furniture for clues, you have no chance of finding the key, regardless of your Wisdom (Perception) check result. You would have to specify that you were opening the drawers

or searching the bureau in order to have any chance of success. Survival The DM might ask you to make a Wisdom (Survival) check to follow tracks, hunt wild game, guide your group through frozen

Wisdom

Compendium - Sources->Dungeons & Dragons->Player's Handbook (2014)

room, looking at the walls and furniture for clues, you have no chance of finding the key, regardless of your Wisdom (Perception) check result. You would have to specify that you were opening the

drawers or searching the bureau in order to have any chance of success. Survival. The DM might ask you to make a Wisdom (Survival) check to follow tracks, hunt wild game, guide your group through frozen

Vault Keys

Compendium - Sources->Dungeons & Dragons->Waterdeep: Dragon Heist

, a character must spend 1 day and 5 gp researching the location of a key. At the end of this day, the character makes a DC 15 Intelligence (Investigation) check, learning the location of the key on a

success. If the check fails by 5 or more, the main villain learns of the search and sends lackeys to attack the characters and, if possible, wrest the Stone of Golorr from them: Xanathar sends either

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