before being diameter contain random

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

determine what it does on its next turn: 1–4. The target does nothing.5–6. The target takes no action or Bonus Action and uses all its movement to move in a random direction.7–8. The

Portable Hole

Magic Items Dungeon Master’s Guide

This fine black cloth, soft as silk, is folded up to the dimensions of a handkerchief. It unfolds into a circular sheet 6 feet in diameter. You can take a Magic action to unfold a Portable Hole and

where the one item was placed inside the other. Any creature within 10 feet of the gate and not behind Total Cover is sucked through it and deposited in a random location on the Astral Plane. The gate then closes. The gate is one-way only and can’t be reopened.

Orb of Dragonkind

Magic Items Dungeon Master’s Guide

;s control. An orb is an etched crystal globe about 10 inches in diameter. When used, it grows to about 20 inches in diameter, and mist swirls inside it. While attuned to an orb, you can take a

, freedom from the orb, to spread suffering in the world, to advance the worship of Tiamat, or something else the DM decides. Random Properties. An Orb of Dragonkind has the following random properties

Hat of Many Spells

Magic Items Dungeon Master’s Guide

its normal casting time, and you can’t use this property again until you finish a Short or Long Rest. On a failed check, you fail to cast the spell and a random effect occurs instead

, determined by rolling on the following table. Any spell you cast from the hat uses your spell save DC and spell attack bonus. 1d100 Effect 01–50 You cast a random spell determined by

Sphere of Annihilation

Magic Items Dungeon Master’s Guide

This 2-foot-diameter black sphere is a hole in the multiverse, hovering in space and stabilized by a magical field surrounding it. The sphere obliterates all matter it passes through and all matter

extradimensional space. 86–00 A spatial rift sends the sphere and each creature and object within 180 feet of the sphere to a random plane of existence.

Orb of Damara

Magic Items Forgotten Realms: Adventures in Faerûn

away. The Orb of Damara is about 6 inches in diameter and is made of a glassy, iridescent material that's like obsidian but incredibly hard. If held to one's own lips with the intention of consuming

the start of its next turn. A creature that succeeds on this save is immune to the aura’s effects for 24 hours. Flight. You have a Fly Speed of 60 feet and can hover. Random Properties. The

Brigganock

Monsters The Wild Beyond the Witchlight

feet. If the brigganock dies, its soul light fades away. Tunneler. Using a pickaxe or similar tool, a brigganock can burrow through solid rock at a speed of 5 feet, leaving a 6-inch-diameter tunnel

wish stones, discarding the ones that contain wishes of ill intent and keeping those that hold good wishes. Brigganocks refine wish stones into gems and use them to decorate their architecture

Bag of Holding Legacy

Magic Items Basic Rules (2014)

This bag has an interior space considerably larger than its outside dimensions, roughly 2 feet in diameter at the mouth and 4 feet deep. The bag can hold up to 500 pounds, not exceeding a volume of

inside the other. Any creature within 10 feet of the gate is sucked through it to a random location on the Astral Plane. The gate then closes. The gate is one-way only and can’t be reopened.

Portable Hole Legacy

Magic Items Basic Rules (2014)

This fine black cloth, soft as silk, is folded up to the dimensions of a handkerchief. It unfolds into a circular sheet 6 feet in diameter. You can use an action to unfold a portable hole and place

one item was placed inside the other. Any creature within 10 feet of the gate is sucked through it and deposited in a random location on the Astral Plane. The gate then closes. The gate is one-way only and can’t be reopened.

Orb of Dragonkind Legacy

Magic Items Basic Rules (2014)

globe about 10 inches in diameter. When used, it grows to about 20 inches in diameter, and mist swirls inside it. While attuned to an orb, you can use an action to peer into the orb’s depths and

advance the worship of Tiamat, or something else the GM decides. Random Properties An Orb of Dragonkind has the following random properties: 2 minor beneficial properties 1 minor detrimental

Sphere of Annihilation Legacy

Magic Items Basic Rules (2014)

This 2-foot-diameter black sphere is a hole in the multiverse, hovering in space and stabilized by a magical field surrounding it. The sphere obliterates all matter it passes through and all matter

or into the extradimensional space. 86-00 A spatial rift sends each creature and object within 180 feet of the sphere, including the sphere, to a random plane of existence.

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

contains ample space for food, as well as one or more hidden chambers where the dragon keeps its treasure. Depending on the composition and features of the moon, the lair might contain natural springs

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

contain natural springs and heat vents, wild gardens, crystal formations, magical phenomena, or an ecosystem of lesser life forms that have adapted to living with the dragon. Regional Effects The region

Devastation Orb

Magic Items Princes of the Apocalypse

diameter, weighs 10 pounds, and has a solid outer shell. The orb detonates 1d100 hours after its creation, releasing the elemental energy it contains. The orb gives no outward sign of how much time

. Reducing it to 0 hit points causes it to explode instantly. A special container can be crafted to contain a devastation orb and prevent it from detonating. The container must be inscribed with symbols

Gauth

Monsters Mordenkainen Presents: Monsters of the Multiverse

":"piercing"} piercing damage. Eye Rays. The gauth shoots three of the following magical eye rays at random (roll three d6s;{"diceNotation":"1d6","rollType":"roll","rollAction":"Eye Rays"}, and reroll

Constructs and Undead.A gauth is a hungry, tyrannical creature similar to a beholder that eats magic and tries to exact tribute from anything weaker than itself. Its body is about 4 feet in diameter, with

Juiblex

Monsters Mordenkainen Presents: Monsters of the Multiverse

the slime appears, each creature on it must succeed on a DC 21 Dexterity saving throw or fall prone and slide 10 feet in a random direction determined by a d8 roll. When a creature enters the area for

, this creature can move up to 20 feet through spaces no more than an inch in diameter. It must end this movement in a space that can accommodate its full size. Otherwise, it takes 5 force damage and

Ancient Time Dragon

Monsters Planescape: Adventures in the Multiverse

Cycle of Rebirth. If the dragon dies, its soul coalesces into a steely egg and teleports to a random plane of existence. The egg is immune to all damage and hatches into a time dragon wyrmling after

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

Crook of Rao

Magic Items Tasha’s Cauldron of Everything

;potentially for the final time. Random Properties. The artifact has the following random properties, which you can determine by rolling on the tables in the "Artifacts" section of the Dungeon Master

conjured as a result of this effect appear in random unoccupied spaces within 60 feet of you and are not under your control. Extraplanar Reversal d100 Effect 1–25 A portal to

Yeenoghu Legacy

Monsters Out of the Abyss

flail attacks. If an attack hits, he can cause it to create an additional effect of his choice or at random (each effect can be used only once per Multiattack): 1. The attack deals an extra 13 (2d12

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

Halaster Blackcloak

Monsters Waterdeep: Dungeon of the Mad Mage

parts restored. His new body appears in a random safe location in Undermountain. Spellcasting. Halaster is a 20th-level spellcaster. His spellcasting ability is Intelligence (spell save DC 22, +14 to hit

ghostly, 1-foot-diameter humanoid eye surrounded by motes of light. The sensor is stationary, though Halaster can reorient the eye to face in any direction. Halaster can see through the eye as though he

Sapphire Dragon Wyrmling

Monsters Fizban's Treasury of Dragons

half its burrowing speed and can leave a 5-foot-diameter tunnel in its wake.Bite. Melee Weapon Attack: +5;{"diceNotation":"1d20+5", "rollType":"to hit", "rollAction":"Bite"} to hit, reach 5 ft

hoard is usually a cataloged, orderly collection of war gear, which can contain ancient relics of immense power. Creating a Sapphire Dragon Use the Sapphire Dragon Personality Traits and Sapphire

Young Sapphire Dragon

Monsters Fizban's Treasury of Dragons

burrowing speed and can leave a 10-foot-diameter tunnel in its wake.Multiattack. The dragon makes one Bite attack and two Claw attacks. Bite. Melee Weapon Attack: +9;{"diceNotation":"1d20+9", "rollType

, which can contain ancient relics of immense power. Creating a Sapphire Dragon Use the Sapphire Dragon Personality Traits and Sapphire Dragon Ideals tables to inspire your portrayal of distinctive

Nafas

Monsters Quests from the Infinite Staircase

":"roll", "rollAction":"Last Wish"} days, regaining all his hit points and appearing in a random safe location on the Infinite Staircase. Legendary Resistance (5/Day). If Nafas fails a saving throw

of twinkling stardust follows Nafas wherever he goes, as evidence of his cosmic might. No bottle, vase, ring, or lamp can contain Nafas. The genie is bound to the Infinite Staircase itself, anchored

Ancient Deep Dragon Legacy

Monsters Fizban's Treasury of Dragons

around a creature within 30 feet of it that it can see. The target must succeed on a DC 19 Wisdom saving throw or use its reaction to make a melee weapon attack against a random creature within reach. If

financial or sentimental value to the host dragon are stored away in the protected hoard, these tastefully appointed visitors’ chambers contain lesser treasures from inaccessible or storied locales

Ancient Sapphire Dragon

Monsters Fizban's Treasury of Dragons

needing to make an ability check. Tunneler. The dragon can burrow through solid rock at half its burrowing speed and can leave a 20-foot-diameter tunnel in its wake.Multiattack. The dragon makes one

protect against psychic damage or mental intrusion. The centerpiece of a sapphire dragon’s hoard is usually a cataloged, orderly collection of war gear, which can contain ancient relics of

Adult Deep Dragon Legacy

Monsters Fizban's Treasury of Dragons

creature within 30 feet of it that it can see. The target must succeed on a DC 16 Wisdom saving throw or use its reaction to make a melee weapon attack against a random creature within reach. If no

treasures with significant financial or sentimental value to the host dragon are stored away in the protected hoard, these tastefully appointed visitors’ chambers contain lesser treasures from

Iggwilv's Cauldron

Magic Items The Wild Beyond the Witchlight

—eight of each animal. In either form, the cauldron is roughly 3 feet in diameter and has a 2-foot-wide mouth, a round lid with a molded handle at the top, and eight clawed feet for stability. The

can attune to the cauldron simultaneously, provided they have formed a coven. If the coven disbands, the attunement ends for all three hags. Random Properties. Regardless of the form it takes, the

Starting Area

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

Starting Area The Starting Area table produces a chamber or a set of corridors at the entrance to your dungeon. When rolling for a random starting area, pick one of the doors or passages leading into

. diameter; one passage at each cardinal direction 7 Circle, 40 ft. diameter; one passage in each cardinal direction; well in middle of room (might lead down to lower level) 8 Square, 20 × 20 ft

The Worm Tunnels

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

south of this nursery. Use the guidelines in chapters 2 and 10 as the party travels through the Underdark, but use the Wormwrithings Encounters table instead of the random encounter tables in chapter 2

the Underdark, spellcasters won’t have to deal with the effects described under “Faerzress” in chapter 2. The tunnels created by the purple worms are tubular and roughly 10 feet in diameter. A typical stretch of tunnel is 1d6 miles long before it intersects with another tunnel or a naturally formed cavern.

Kobold Legacy

Species Volo's Guide to Monsters

earth are strong or weak, are bearing a load or are safe to excavate, or are likely to contain minerals or offer access to water. This ability enables them to fashion secure homes in places where other

creatures wouldn’t feel safe. Kobolds take advantage of their size by creating small-diameter tunnels that they can easily pass through, but that require larger creatures to hunch over or even

The Yawning Portal

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

with a slate roof and several chimneys. Most of the ground floor is taken up by the tavern’s common room, which contains a 40-foot-diameter open well (actually the outer shell of a sunken stone tower

information about this entrance to Undermountain can be found in Waterdeep: Dungeon of the Mad Mage. The upper floors of the Yawning Portal contain comfortable, nicely appointed rooms for guests. Durnan, the

The Expedition Begins

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

The Expedition Begins The sections that follow contain information that will help you run this part of the adventure smoothly. For each day that the party travels through the wilderness, follow these

” below). Check for random encounters throughout the day (see appendix B). At the end of the day, check to see if any party members are dehydrated (see “Dehydration” below).

8. Thanks for the Memories

Compendium - Sources->Dungeons & Dragons->Waterdeep: Dungeon of the Mad Mage

sinkhole, which plunges 100 feet into darkness. (At the bottom of the sinkhole lies a moldering beholder corpse.) Elevated Tunnel. A 10-foot-diameter tunnel in the west wall can be reached by

“Treasure” below). The gas spores carry the memories of the beholder that birthed them. A creature that inhales the spores inherits a random beholder memory, determined by rolling on the Beholder

Bag of Holding

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

Bag of Holding Wondrous item, uncommon This bag has an interior space considerably larger than its outside dimensions, roughly 2 feet in diameter at the mouth and 4 feet deep. The bag can hold up to

originates where the one item was placed inside the other. Any creature within 10 feet of the gate is sucked through it to a random location on the Astral Plane. The gate then closes. The gate is one-way only and can’t be reopened.

Random Obstacles

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

Random Obstacles Obstacles block progress through the dungeon. In some cases, what adventurers consider an obstacle is an easy path for the dungeon’s inhabitants. For example, a flooded chamber is a

nearby upward-sloping passages, raised floors, or rising stairs to contain the water 15 Lava flows through the area (50 percent chance of a stone bridge crossing it) 16 Overgrown mushrooms block

D&D Beyond

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