percent are and his 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.

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

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

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

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

Deck of Wonder

Magic Items The Book of Many Things

Created in the image of the Deck of Many Things, this deck of ivory or vellum cards bestows an assortment of minor benefits and penalties on those who draw from it. Most (75 percent) of these decks

(chosen by the DM) disappears. The item remains nearby but concealed for a short time, so it can be found with a successful DC 15 Wisdom (Perception) check. If the item isn’t recovered within 1 hour, it disappears forever.

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

unoccupied space it can see. Summon Yugoloth (1/Day). The nycaloth chooses what to summon and attempts a magical summoning. A nycaloth has a 50 percent;{"diceNotation":"1d100","rollType":"roll

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

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 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

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

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 Tall Man

monsters

and other magical effects. Memory’s Dance. As a Bonus Action, a creature can perform some steps from a dance of the Tall Man’s court and make a DC 20 Charisma (Performance) check. On a

of the lair, shadows stretch far beyond what they should. Creatures can find a sufficiently shadowy spot to hide in, even without cover, 50 percent of the time. Too Quiet. Sounds are muffled within

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

malfunction returns to 10 percent. Random Properties. There are far more possible combinations for the Infernal Machine’s controls than can ever be known or matrixed—especially as the controls

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

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

13. Bear Laboratory

Compendium - Sources->Dungeons & Dragons->Infernal Machine Rebuild

on a DC 14 Wisdom (Animal Handling) check can successfully quiet them. Barbatos The ranger Barbatos is either here or in area 12 (a 50 percent chance for either), accompanied by his hell hound

their way to area 1 and up the stairs. If Barbatos is still in the room when the bears escape, they attack him first. A character who succeeds on a DC 20 Wisdom (Animal Handling) check can convince at

13. Bear Laboratory

Compendium - Sources->Dungeons & Dragons->Infernal Machine Rebuild

on a DC 14 Wisdom (Animal Handling) check can successfully quiet them. Barbatos The ranger Barbatos is either here or in area 12 (a 50 percent chance for either), accompanied by his hell hound

their way to area 1 and up the stairs. If Barbatos is still in the room when the bears escape, they attack him first. A character who succeeds on a DC 20 Wisdom (Animal Handling) check can convince at

Underwater

Compendium - Sources->Dungeons & Dragons->Dungeon Master’s Guide (2014)

Underwater See chapter 9 of the Player’s Handbook for rules on underwater combat. Random Undersea Encounters You can check for random undersea encounters as often as you would check for them on land

Encounters d12 + d8 Encounter 2 Sunken ship covered in barnacles (25 percent chance that the ship contains treasure; roll randomly on the treasure tables in chapter 7) 3 Sunken ship with reef sharks

Darklake Terrain Encounters

Compendium - Sources->Dungeons & Dragons->Out of the Abyss

and runs aground. The characters can push the vessel back into the water with a successful DC 10 group Strength (Athletics) check. While characters are pushing their boat free, there is a 50 percent

(Athletics) check to push it free. While characters are pushing their boat free, there is a 50 percent chance that one or more creatures attack them; in this event, roll on the Darklake Creature Encounters

Darklake Terrain Encounters

Compendium - Sources->Dungeons & Dragons->Out of the Abyss

and runs aground. The characters can push the vessel back into the water with a successful DC 10 group Strength (Athletics) check. While characters are pushing their boat free, there is a 50 percent

(Athletics) check to push it free. While characters are pushing their boat free, there is a 50 percent chance that one or more creatures attack them; in this event, roll on the Darklake Creature Encounters

Underwater

Compendium - Sources->Dungeons & Dragons->Dungeon Master’s Guide (2014)

Underwater See chapter 9 of the Player’s Handbook for rules on underwater combat. Random Undersea Encounters You can check for random undersea encounters as often as you would check for them on land

Encounters d12 + d8 Encounter 2 Sunken ship covered in barnacles (25 percent chance that the ship contains treasure; roll randomly on the treasure tables in chapter 7) 3 Sunken ship with reef sharks

Kamadans

Compendium - Sources->Dungeons & Dragons->Tomb of Annihilation

. Characters who prevail against the kamadans can search the area for their lair, finding it with a successful DC 15 Wisdom (Survival) check. A kamadan lair has a 25 percent chance of containing 1d3

noncombatant young the size of house cats. With their snakes not yet grown out, they look like leopard cubs. Ifan Talro’a in Port Nyanzaru will pay 150 gp for a live kamadan cub, but a successful DC 15 Charisma (Persuasion) check talks him up to 300 gp.

Kamadans

Compendium - Sources->Dungeons & Dragons->Tomb of Annihilation

. Characters who prevail against the kamadans can search the area for their lair, finding it with a successful DC 15 Wisdom (Survival) check. A kamadan lair has a 25 percent chance of containing 1d3

noncombatant young the size of house cats. With their snakes not yet grown out, they look like leopard cubs. Ifan Talro’a in Port Nyanzaru will pay 150 gp for a live kamadan cub, but a successful DC 15 Charisma (Persuasion) check talks him up to 300 gp.

Religious Service

Compendium - Sources->Dungeons & Dragons->Xanathar's Guide to Everything

either an Intelligence (Religion) check or a Charisma (Persuasion) check. The total of the check determines the benefits of service, as shown on the Religious Service table. Religious Service Check Total

percent. A favor could also take the form of a deity’s intervention, such as an omen, a vision, or a minor miracle provided at a key moment. This latter sort of favor is expended by the DM, who also

Entering Derro Territory

Compendium - Sources->Dungeons & Dragons->Out of the Abyss

information. A successful DC 15 Charisma (Intimidation) check also works, but has a 50 percent chance of inspiring the derro to flee or attack.

. At the end of each hour the adventurers stay inside either derro area, there is a 25 percent chance that 2d4 derro (see appendix C) attack without warning. If the characters kill any derro, the

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