building block diffusing check rules

Mason's Tools

Equipment

Ability: Strength Utilize: Chisel a symbol or hole in stone (DC 10) Craft: Block and Tackle If you have proficiency with a tool, add your Proficiency Bonus to any ability check you make that uses

the tool. If you have proficiency in a skill that’s used with that check, you have Advantage on the check too.

Find Steed

Spells Player’s Handbook

You summon an otherworldly being that appears as a loyal steed in an unoccupied space of your choice within range. This creature uses the Otherworldly Steed stat block. If you already have a steed

the steed’s creature type—Celestial, Fey, or Fiend—which determines certain traits in the stat block. Combat. The steed is an ally to you and your allies. In combat, it shares your

Giant Insect

Spells Player’s Handbook

You summon a giant centipede, spider, or wasp (chosen when you cast the spell). It manifests in an unoccupied space you can see within range and uses the Giant Insect stat block. The form you choose

determines certain details in its stat block. The creature disappears when it drops to 0 Hit Points or when the spell ends. The creature is an ally to you and your allies. In combat, the creature

Houseward

magic-items

This engraved block of lead, approximately 1 cubic foot in size, holds an embedded Siberys dragonshard. The Houseward provides state-of-the-art magical security, and is typically embedded into the

floor of the building it is supposed to protect. If any creature with the Mark of Warding spends 10 minutes touching the Houseward, it can cast Guards and Wards without requiring Material components

Leprechaun

Monsters Quests from the Infinite Staircase

, 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

roll to use, potentially turning the failure into a success.Leprechauns are manifestations of the Feywild rules of hospitality and reciprocity. These rules infuse leprechauns with a deep connection to

Istarian Drone

Monsters Dragonlance: Shadow of the Dragon Queen

Spider Climb. The drone can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check. Unusual Nature. The drone doesn’t require air, food, drink

scuttling insectile legs and barbed, scythe-shaped arms for carrying and placing building materials. The drones create a viscous gel that hardens into crystalline mortar, which they can repurpose to restrain attackers.Lightning, Poison

Fraternity of Order Law Bender

Monsters Planescape: Adventures in the Multiverse

armor, mage hand, prestidigitationProbability Loophole (3/Day). When the law bender or a creature it can see makes an attack roll, a saving throw, or an ability check, the law bender can cause the roll

to be made with advantage or disadvantage.Members of the Fraternity of Order find and exploit loopholes in the laws of the multiverse. Law benders are magistrates who skirt the rules of probability

Spiderdragon

Monsters Vecna: Eve of Ruin

ceilings, without needing to make an ability check. Web Walker. The spiderdragon ignores movement restrictions caused by webbing.Multiattack. The spiderdragon makes one Bite attack and two Claw attacks

powerful as their black dragon progenitors, though, and they often drain the enclaves’ resources with their selfish demands. Uninterested in building lairs, spiderdragons weave powerful webs and

Boss Delour

Monsters The Book of Many Things

but otherwise uses the wererat stat block, excluding actions that require equipment the target doesn’t have. During any night when there’s a full moon in the sky, the target becomes an NPC

"} poison damage.Delour the wererat is a sly trickster and consummate thief who rules the Moonstalkers alongside his friend Boss Augustus;Augustus. Delour’s honeyed words and calculating mind make

Baba Lysaga's Creeping Hut

Monsters Curse of Strahd

attacks with its flailing and stomping roots. It can also use its roots to fling large rocks. Hut Interior. The hut is a 15-foot-square, ramshackle wooden building with a gently sloping thatch roof. Its

contained in a cavity in the stump, beneath the rotted floorboards of the hut. The floorboards can be ripped up with a successful DC 14 Strength check or smashed by dealing 10 damage to them. Once the

Alustriel Silverhand

Monsters Vecna: Eve of Ruin

, it fails and has no effect. If the spell is 6th level or higher, Alustriel makes an Intelligence check (DC 10 plus the spell’s level). On a successful check, the spell fails and has no effect

are to spread kindness, reward virtue, and promote a culture of compassion throughout the multiverse. She is good at building alliances and quick to intervene when she senses a threat to the forces of

Conclave Dryad

Monsters Guildmasters’ Guide to Ravnica

become restrained by twisting vines for 1 minute. A target restrained in this way can use an action to make a DC 17 Strength (Athletics) or Dexterity (Acrobatics) check, ending the effect on itself on

the dryad. The mount remains for 8 hours, until it or the dryad dies, or until the dryad dismisses it as an action. The mount uses the stat block of an elk (see the Monster Manual) with these changes

Wereraven

Monsters Curse of Strahd

successful DC 10 Wisdom (Insight) check. Regeneration. The wereraven regains 10 hit points at the start of its turn. If the wereraven takes damage from a silvered weapon or a spell, this trait

, modestly give money to charity. They take steps to keep magic items out of evil hands by stashing them in secret hiding places. Characters as Wereravens. The Monster Manual has rules for characters

Adult Green Dragon Legacy

Monsters Basic Rules (2014)

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 Attack. The dragon makes a tail

saving throw or be restrained by the roots and vines. A creature can be freed if it or another creature takes an action to make a DC 15 Strength check and succeeds. The roots and vines wilt away when

Ancient White Dragon Legacy

Monsters Basic Rules (2014)

Ice Walk. The dragon can move across and climb icy surfaces without needing to make an ability check. Additionally, difficult terrain composed of ice or snow doesn't cost it extra movement

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 (Costs 2 Actions). The dragon beats its wings. Each

Horrid Plant

Monsters Quests from the Infinite Staircase

; 3–4, purple blossom; or 5–6, snapper saw. This form determines certain traits in this stat block. False Appearance. If the horrid plant is motionless at the start of combat, it has

advantage on its initiative roll. Moreover, if a creature hasn’t observed the horrid plant move or act, that creature must succeed on a DC 18 Intelligence (Nature) check to discern that the horrid

Avarice

Monsters Icewind Dale: Rime of the Frostmaiden

challenge, even when the odds are clearly stacked against her. Seeing other wizards as a threat, paranoia rules her life. Avarice has been a member of the Arcane Brotherhood for almost two years. She

the Knights of the Black Sword, if she needs to call on their talents. Familiar. Avarice’s familiar throughout the adventure is a squawking raven named Skelm. It uses the raven stat block in

Drow Matron Mother

Monsters Mordenkainen Presents: Monsters of the Multiverse

;Mothers of Rebellion Some matron mothers renounce Lolth and join the war against their former goddess. Such drow could be of any alignment, and they lose the following abilities in the stat block

Underdark armies arrayed against the followers of Lolth. A Matron Mother’s Lair The palace of a drow matron mother is her home and fortress. Sigils throughout the building allow the matron

Giff (Gunpowder Keg Variant)

Monsters Mordenkainen Presents: Monsters of the Multiverse

armed with gleaming pistols and muskets. The stat block here represents one of those mercenaries. Every aspect of these spacefaring giff’s society is organized along military lines. From birth

. 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.

Riffler

Monsters The Book of Many Things

such cards in that range. Effects that protect a target from divination magic block this sense. Riffling Step. The riffler can burrow through any nonmagical material that isn’t iron, shuffling the

material components and using Charisma as the spellcasting ability.Shuffle Destiny. When a creature the riffler can see within 30 feet of itself makes an ability check, an attack roll, or a saving throw

Adult White Dragon Legacy

Monsters Basic Rules (2014)

Ice Walk. The dragon can move across and climb icy surfaces without needing to make an ability check. Additionally, difficult terrain composed of ice or snow doesn't cost it extra movement

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 (Costs 2 Actions). The dragon beats its wings. Each

Ancient Green Dragon Legacy

Monsters Basic Rules (2014)

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 Attack. The dragon makes

Strength saving throw or be restrained by the roots and vines. A creature can be freed if it or another creature takes an action to make a DC 15 Strength check and succeeds. The roots and vines wilt

Giff Legacy

Monsters Mordenkainen’s Tome of Foes

building a bomb big enough to level a fortification. They gladly accept payment in kegs of gunpowder in preference to gold, gems, or other currency. No Honor in Magic. Some giff become wizards

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.

Living Portent

Monsters The Book of Many Things

", "rollAction":"Prophetic Blessing"}, and it gains a prophecy die, a d8. Once during each of the creature’s turns, when it fails an ability check or saving throw or misses an attack roll, it can

’ will. These living portents are Aberrations instead of Celestials and are typically chaotic evil. They replace any radiant damage in their stat block with necrotic or psychic damage (DM&rsquo

Homunculus Servant

spells Eberron: Forge of the Artificer

You summon a special homunculus in an unoccupied space within range. This creature uses the Homunculus Servant stat block. If you already have a homunculus from this spell, the homunculus is replaced

action and uses its movement to avoid danger. Using a Higher-Level Spell Slot. Use the spell slot’s level for the spell’s level in the stat block. Homunculus Servant Tiny

Proficiency Bonus Legacy

Rules

Characters have a proficiency bonus determined by level, as detailed in chapter 1. Monsters also have this bonus, which is incorporated in their stat blocks. The bonus is used in the rules on ability

checks, saving throws, and attack rolls. Your proficiency bonus can’t be added to a single die roll or other number more than once. For example, if two different rules say you can add your

Senses (Passive Checks) Legacy

Rules

Passive Checks A passive check is a special kind of ability check that doesn't involve any die rolls. Such a check can represent the average result for a task done repeatedly, such as searching for

how to determine a character's total for a passive check: 10 + all modifiers that normally apply to the check If the character has advantage on the check, add 5. For disadvantage, subtract 5. The game

Grim Champion of Desolation

Monsters The Book of Many Things

draconic beast with pale, leathery wings and emaciated skin; this mount uses the wyvern stat block, but it is an Undead instead of a Dragon. An eerie, hollow silence heralds the champion’s arrival

champions rarely agree on anything is a major check on the group’s power. Instead of the Grim Harrow acting as a unified force, each of the three champions usually pursues their own interests, seldom

Theran Chimera

Monsters Mythic Odysseys of Theros

shrug off spells cast against them. Customizing a Chimera The Theran chimera stat block presents one possible chimera configuration. You may customize these statistics to design your own unique chimera

, and Tail Attacks tables replace those respective actions in the stat block. Theran chimeras always have the Claws action. If the results of multiple tables conflict, chose your preferred result. Body

Grim Champion of Bloodshed

Monsters The Book of Many Things

fire, Wynemar embodies the havoc of violence and war. She rides a flaming steed that uses the nightmare stat block but is an Undead instead of a Fiend. The Grim Champions The Grim Harrow is led by

, Grim Champion of Bloodshed, and Aleron, Grim Champion of Pestilence—rival Jyn for power and together can oppose her. The fact that the three champions rarely agree on anything is a major check on

Criminal - Baldur's Gate

Backgrounds Baldur’s Gate: Descent into Avernus

underbelly of civilization, and you have survived up to this point by flouting the rules and regulations of society. Skill Proficiencies: Deception, Stealth Tool Proficiencies: One

Guild took over your family business, ran it into the ground, and burned the building for insurance money. You were driven into crime yourself, but you’ll never work for the Guild. You take

Claugiyliamatar

Monsters Storm King's Thunder

(Perception) 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 23 Dexterity

check and succeeds. The roots and vines wilt away when the dragon uses this lair action again or when the dragon dies. A wall of tangled brush bristling with thorns springs into existence on a solid

Izzet Engineer

Backgrounds Guildmasters’ Guide to Ravnica

and twisted remains of a failed experiment, a hammer, a block and tackle, a set of common clothes, and a belt pouch containing 5 gp (Azorius 1-zino coins) Feature: Urban Infrastructure The popular

basic knowledge of the structure of buildings, including the stuff behind the walls. You can also find blueprints of a specific building in order to learn the details of its construction. Such

Claugiyliamatar (possessed)

Monsters Divine Contention

(Perception) 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 23 Dexterity

or be restrained by the roots and vines. A creature can be freed if it or another creature takes an action to make a DC 15 Strength check and succeeds. The roots and vines wilt away when the dragon

Introduction: How to Use a Monster

Compendium - Sources->Dungeons & Dragons->Monster Manual

the rules for monster customization and encounter building in the Dungeon Master’s Guide—to build your own adventures. Consult appendix B for monster lists that will help your adventure building. What’s

New in the 2025 Version? This is the 2025 version of the fifth edition Monster Manual. If you’ve read the 2014 version, much of this book will feel familiar, since the fundamental rules and variety

D&D Beyond

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