both being diameter course rolls

Umber Hulk

Monsters Monster Manual

Tunneler. The umber hulk can burrow through solid rock at half its Burrow Speed and leaves a 10-foot-diameter tunnel in its wake.Multiattack. The umber hulk makes three Rend attacks. Rend. Melee

. Failure: The target can’t take Reactions until the start of the umber hulk’s next turn, and the target rolls 1d8;{"diceNotation":"1d8", "rollType":"roll", "rollAction":"Confusing Gaze"} to

Staff of the Woodlands

Magic Items Dungeon Master’s Guide

This staff has 6 charges and can be wielded as a magic Quarterstaff that grants a +2 bonus to attack rolls and damage rolls made with it. While holding it, you have a +2 bonus to spell attack rolls

is 60 feet tall and has a 5-foot-diameter trunk, and its branches at the top spread out in a 20-foot radius. The tree appears ordinary but radiates a faint aura of Transmutation magic that can be

Symbol

Spells Player’s Handbook

feet in diameter. If you choose an object, it must remain in place; if it is moved more than 10 feet from where you cast this spell, the glyph is broken, and the spell ends without being triggered

Disadvantage on attack rolls and ability checks. Fear. Each target must succeed on a Wisdom saving throw or have the Frightened condition for 1 minute. While Frightened, the target must move at least 30

Vampire Infernalist

Monsters Astarion's Book of Hungers

sunlight. While in sunlight, it has Disadvantage on attack rolls and ability checks.Multiattack (Vampire Form Only). The vampire makes two Hellfire Claw attacks and uses Bite. Hellfire Claw (Vampire

course it is. —Astarion on Vampire Infernalists Vampire Infernalist Lairs Vampire infernalists lurk in gloomy libraries or ritual chambers, far from the sun’s light. The region

Aurumvorax Den Leader

Monsters Journeys through the Radiant Citadel

Pack Leader. The aurumvorax’s allies have advantage on attack rolls while within 10 feet of the aurumvorax, provided it isn’t incapacitated. Tunneler. The aurumvorax can burrow through

solid rock and metal at half its burrowing speed and leaves a 5-foot-diameter tunnel in its wake.Multiattack. The aurumvorax makes one Bite attack and two Claw attacks. Bite. Melee Weapon

Wildspacer

Backgrounds Spelljammer: Adventures in Space

to adapt to zero gravity. Being weightless doesn’t give you disadvantage on any of your melee attack rolls (see “Weightlessness” below). WEIGHTLESSNESS In any location where

, flying, or swimming speed in a straight line. The creature continues along this course, moving in a straight line at its speed on each of its turns until something stops it or changes its trajectory.

Lynx Creatlach

Monsters Infernal Machine Rebuild

has disadvantage on attack rolls and ability checks until the end of her next turn. Immutable Form. Lynx is immune to any spell or effect that would alter her form. Lightning Absorption. Whenever Lynx

) have been granted to them by their diabolical masters, and are not meant to be claimed as treasure. If either agent is killed in the course of the adventure, their special equipment vanishes, returning to Bel or Zariel. PoisonNecrotic, Psychic

Yuan-ti Broodguard

Monsters Mordenkainen Presents: Monsters of the Multiverse

Reckless. At the start of its turn, the broodguard can gain advantage on all melee weapon attack rolls it makes during that turn, but attack rolls against it have advantage until the start of its

any time before it runs its course. After the process is complete, only a wish spell can reverse the effect.Poison

Staff of the Woodlands Legacy

Magic Items Basic Rules (2014)

This staff can be wielded as a magic quarterstaff that grants a +2 bonus to attack and damage rolls made with it. While holding it, you have a +2 bonus to spell attack rolls. The staff has 10

tree. The tree is 60 feet tall and has a 5-foot-diameter trunk, and its branches at the top spread out in a 20-foot radius. The tree appears ordinary but radiates a faint aura of transmutation magic

Gloamwing

Monsters Guildmasters’ Guide to Ravnica

Sensitivity. While in sunlight, the gloamwing has disadvantage on attack rolls, as well as on Wisdom (Perception) checks that rely on sight.Multiattack. The gloamwing makes two attacks: one with its bite

responsible. If the specter survives, it can create a new gloamwing over the course of a month, during which time the specter is incapacitated. A gloamwing's head is almost ratlike, with prominent teeth

Howler

Monsters Mordenkainen Presents: Monsters of the Multiverse

Pack Tactics. A howler has advantage on attack rolls against a creature if at least one of the howler’s allies is within 5 feet of the creature and the ally isn’t

hesitation. Howler packs course over the battlefields of the Blood War and also serve evil mortals powerful and vicious enough to command their loyalty. Howlers rely on speed, numbers, and their mind

Yeenoghu Legacy

Monsters Out of the Abyss

same effect two rounds in a row. Yeenoghu causes an iron spike—5 feet tall and 1 inch in diameter—to burst from the ground at a point he can see within 100 feet of him. Any creature in

, causing them to have advantage on melee weapon attack rolls and causing attack rolls to have advantage against them. Regional Effects The region containing Yeenoghu’s lair is warped by his

Yeenoghu

Monsters Mordenkainen Presents: Monsters of the Multiverse

count 20, all gnoll;gnolls and hyena;hyenas within the lair are enraged, causing them to have advantage on melee weapon attack rolls and causing attack rolls to have advantage against them. Iron Spike

. Yeenoghu causes an iron spike—5 feet tall and 1 inch in diameter—to burst from the ground at a point he can see within 100 feet of him. Any creature in the space where the spike emerges

Darkling Legacy

Monsters Volo's Guide to Monsters

disadvantage on attack rolls, as well as on Wisdom (Perception) checks that rely on sight.Dagger. Melee or Ranged Weapon Attack: +5;{"diceNotation":"1d20+5","rollType":"to hit","rollAction":"Dagger"} to

absorbs over the course of its lifetime explodes outward when the darkling dies, incinerating the creature and much of its possessions. Love of Art. Despite their curse, darklings retain a fondness

Juiblex

Monsters Mordenkainen Presents: Monsters of the Multiverse

weapon the target is carrying or wearing takes a permanent −1 penalty to damage rolls. The penalty worsens each time a target is subjected to this effect. If the penalty on an object drops to

, which is slick and sticks to anything that touches it. If Juiblex dies, these effects fade over the course of 1d10;{"diceNotation":"1d10","rollType":"roll"} days. Cultists of Juiblex The Faceless

Demilich Legacy

Monsters Monster Manual (2014)

15 Wisdom saving throw or be magically cursed. Until the curse ends, the target has disadvantage on attack rolls and saving throws. The target can repeat the saving throw at the end of each of its

. A demilich in its lair has a challenge rating of 20 (24,500 XP). Lair Actions On initiative count 20 (losing initiative ties), the demilich rolls a d20;{"diceNotation":"1d20","rollType":"roll

Ancient Time Dragon

Monsters Planescape: Adventures in the Multiverse

damage and is magically weakened as it is desynchronized from the time stream. While the creature is in this state, attack rolls against it have advantage, it has the poisoned condition, and other

the effect on itself after it succeeds on three of these saves. Time Gate (1/Day). The dragon conjures a 20-foot-diameter, circular portal in the space between its horns or in an unoccupied space it

Elder Tempest

Monsters Mordenkainen Presents: Monsters of the Multiverse

tempest is always at the center of a storm 1d6 + 4;{"diceNotation":"1d6+4","rollType":"roll","rollAction":"Living Storm"} miles in diameter. Heavy precipitation in the form of either rain or snow

in the area covered by the storm. The winds impose disadvantage on ranged attack rolls. The winds extinguish open flames and disperse fog. Siege Monster. The tempest deals double damage to objects

Veiled Presence

Monsters The Book of Many Things

Actions). The veiled presence magically emanates dazzling light in a 10-foot-radius sphere centered on itself until the end of its next turn, during which time attack rolls against it have disadvantage

and it has advantage on attack rolls. The sphere moves with the veiled presence. When another creature starts its turn in the light or enters the light for the first time on its turn, that creature must

Adult Lunar Dragon

Monsters Spelljammer: Adventures in Space

-foot-diameter tunnel in its wake. Unusual Nature. The dragon doesn’t require air.Multiattack. The dragon makes one Bite attack and two Claw attacks. Bite. Melee Weapon Attack: +11;{"diceNotation

of bludgeoning damage. If the dragon dies, the moaning stops, the moon devils dissipate, and the black frost disappears over the course of 1d10;{"diceNotation":"1d10","rollType":"roll","rollAction

Ancient Lunar Dragon

Monsters Spelljammer: Adventures in Space

-foot-diameter tunnel in its wake. Unusual Nature. The dragon doesn’t require air.Multiattack. The dragon makes one Bite attack and two Claw attacks. Bite. Melee Weapon Attack: +14;{"diceNotation

cold damage instead of bludgeoning damage. If the dragon dies, the moaning stops, the moon devils dissipate, and the black frost disappears over the course of 1d10;{"diceNotation":"1d10","rollType

Carrion Stalker

Monsters Van Richten’s Guide to Ravenloft

advantage on attack rolls against it. A creature can use its action to try to detach the carrion stalker and force it to move into the nearest unoccupied space, doing so with a successful DC 11 Strength

kills the larvae.A carrion stalker begins life as a pale larva that infests a corpse. Over the course of weeks, this grub burrows, feeds, and grows, ultimately developing into a chitinous mass of pincers

Elder Tempest Legacy

Monsters Mordenkainen’s Tome of Foes

storm 1d6 + 4;{"diceNotation":"1d6+4","rollType":"roll","rollAction":"Living Storm"} miles in diameter. Heavy precipitation in the form of either rain or snow falls there, causing the area to be lightly

winds impose disadvantage on ranged attack rolls. The winds extinguish open flames and disperse fog. Siege Monster. The tempest deals double damage to objects and structures.Multiattack. The tempest

Otherworldly Corrupter

Monsters The Book of Many Things

transformation lasts until the end of the corrupter’s next turn. While transformed, the corrupter has advantage on attack rolls, attack rolls made against it have disadvantage, and it can move through

by a trap. The villain rolls a number of d6s equal to its proficiency bonus, and struck targets take damage equal to the total. The damage is bludgeoning;{"diceNotation":"6d6","rollType":"damage

Symbol Legacy

Spells Basic Rules (2014)

, a scroll, or a treasure chest). If you choose a surface, the glyph can cover an area of the surface no larger than 10 feet in diameter. If you choose an object, that object must remain in its place

communication and has disadvantage on attack rolls and ability checks. Fear. Each target must make a Wisdom saving throw and becomes frightened for 1 minute on a failed save. While frightened, the

Demilich (Variant) Legacy

Monsters Monster Manual (2014)

throw or be magically cursed. Until the curse ends, the target has disadvantage on attack rolls and saving throws. The target can repeat the saving throw at the end of each of its turns, ending the

lair has a challenge rating of 23 (50,000 XP). Lair Actions On initiative count 20 (losing initiative ties), the demilich rolls a d20;{"diceNotation":"1d20","rollType":"roll","rollAction":"Take Lair

Adult Time Dragon

Monsters Planescape: Adventures in the Multiverse

", "rollDamageType":"force"} force damage and is magically weakened as it is desynchronized from the time stream. While the creature is in this state, attack rolls against it have advantage, and it has the

(your choice). Timelessness. Beasts, Humanoids, and Plants within 3 miles of the lair age only 1 year for every 10 years that pass. If the dragon dies, these effects fade over the course of 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Days"} days.

Ambitious Assassin

Monsters The Book of Many Things

two creatures the villain can see in the lair. Each target must succeed on a DC 15 Dexterity saving throw or be struck by a trap. The villain rolls a number of d6s equal to its proficiency bonus, and

to poison damage. If the villain dies, these effects fade over the course of 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Days"} days.

Baphomet Legacy

Monsters Out of the Abyss

effects. Magic Weapons. Baphomet’s weapon attacks are magical. Reckless. At the start of his turn, Baphomet can gain advantage on all melee weapon attack rolls during that turn, but attack rolls

be affected by this regional effect again for 24 hours. If Baphomet dies, these effects fade over the course of 1d10;{"diceNotation":"1d10","rollType":"roll"} days. Madness of Baphomet If a

Enchanting Infiltrator

Monsters The Book of Many Things

target up to two creatures the villain can see in the lair. Each target must succeed on a DC 15 Dexterity saving throw or be struck by a trap. The villain rolls a number of d6s equal to its proficiency

resistance to poison damage. If the villain dies, these effects fade over the course of 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Days"} days.

Ancient Amethyst Dragon

Monsters Fizban's Treasury of Dragons

split open to show their contents and clusters of crystal points more than a foot in diameter that extend six to ten feet from the interior stone surfaces of the lair. These crystals resonate with the

, requiring no spell components and targeting any body of water in that region. If the dragon dies, the populations of aquatic life near the lair return to normal levels over the course of 1d10

Charting a Course

Compendium - Sources->Dungeons & Dragons->Baldur's Gate: Descent into Avernus

Charting a Course Using the map to chart a course from one location to another is unreliable at best. It helps if the characters have visited a destination before, but even that is no guarantee

they’ll end up where they intended. When charting a course through Avernus, ask the player whose character is overseeing navigation to roll two dice: Roll 2d4 if the characters are traveling to an

Yeenoghu's Lair

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

diameter — to burst from the ground at a point he can see within 100 feet of him. Any creature in the space where the spike emerges must make a DC 24 Dexterity saving throw. On a failed save, the

have advantage on melee weapon attack rolls and causing attack rolls to have advantage against them. Regional Effects The region containing Yeenoghu’s lair is warped by his magic, creating one or more

Yeenoghu's Lair

Compendium - Sources->Dungeons & Dragons->Mordenkainen's Tome of Foes

diameter — to burst from the ground at a point he can see within 100 feet of him. Any creature in the space where the spike emerges must make a DC 24 Dexterity saving throw. On a failed save, the

have advantage on melee weapon attack rolls and causing attack rolls to have advantage against them. Regional Effects The region containing Yeenoghu’s lair is warped by his magic, creating one or more

Dampened Magic Zone

Compendium - Sources->Dungeons & Dragons->Netheril’s Fall: Tales of Terror, Treasure, and Time Travel

as at twilight or after magical weather. In a dampened magic zone, which is typically no more than 300 feet in diameter, magical effects sputter feebly or appear ephemeral. When a creature in the area

casts a spell with a duration of 1 minute or longer, the spell’s duration is halved. Spell attack rolls in the area are made with Disadvantage, and creatures have Advantage on saving throws against spells and other magical effects.

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