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Magic Items
Dungeon Master’s Guide
spell must be on the Wizard spell list, it must be of a level you can cast, and it can’t have Material components costing more than 1,000 GP. Once you decide on the spell, you must expend a spell
rolling 1d10: on a 1, Enlarge/Reduce (enlarge effect); on a 2, Enlarge/Reduce (reduce effect); on a 3, Faerie Fire; on a 4, Fireball; on a 5, Gust of Wind; on a 6, Invisibility (cast on yourself); on a
Equipment
It’s up to you to decide whether a character has proficiency with a firearm. Characters in most D&D worlds wouldn’t have such proficiency. During their downtime, characters can use
following mastery property. To use this property, you must have a feature that lets you use it.
Slow. If you hit a creature with this weapon and deal damage to it, you can reduce its Speed by 10 feet until
Equipment
It’s up to you to decide whether a character has proficiency with a firearm. Characters in most D&D worlds wouldn’t have such proficiency. During their downtime, characters can use
following mastery property. To use this property, you must have a feature that lets you use it.
Slow. If you hit a creature with this weapon and deal damage to it, you can reduce its Speed by 10 feet until
Equipment
It’s up to you to decide whether a character has proficiency with a firearm. Characters in most D&D worlds wouldn’t have such proficiency. During their downtime, characters can use
following mastery property. To use this property, you must have a feature that lets you use it.
Slow. If you hit a creature with this weapon and deal damage to it, you can reduce its Speed by 10 feet until
True Polymorph
Legacy
This doesn't reflect the latest rules and lore.
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Spells
Basic Rules (2014)
before it transformed. If it reverts as a result of dropping to 0 hit points, any excess damage carries over to its normal form. As long as the excess damage doesn’t reduce the creature’s
creature’s challenge rating is 9 or lower. The creature is friendly to you and your companions. It acts on each of your turns. You decide what action it takes and how it moves. The GM has the creature
Ancient Deep Dragon
Legacy
This doesn't reflect the latest rules and lore.
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Monsters
Fizban's Treasury of Dragons
or ambush visitors if the need arises. A well-cultivated lair abounds with Underdark fungi and plants, with the floor, walls, and ceiling covered in carpets of mold and moss, or featuring larger
conjures sludge-like moss that briefly covers surfaces in the lair. The ceiling, floor, and walls of the lair become difficult terrain until initiative count 20 on the next round.
Toxic Spores. The
Adult Deep Dragon
Legacy
This doesn't reflect the latest rules and lore.
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Monsters
Fizban's Treasury of Dragons
that allow them to escape or ambush visitors if the need arises. A well-cultivated lair abounds with Underdark fungi and plants, with the floor, walls, and ceiling covered in carpets of mold and moss
.
Mossy Sludge. The dragon conjures sludge-like moss that briefly covers surfaces in the lair. The ceiling, floor, and walls of the lair become difficult terrain until initiative count 20 on the next round
Backgrounds
Guildmasters’ Guide to Ravnica
ability, enlarge/reduce
3rd
gaseous form, water breathing, wind wall
4th
freedom of movement, polymorph
5th
creation
When your magic causes physical
make a nice sideshow act.
9
I left the Selesnya — and a lover — behind when I joined the Simic.
10
Roll an additional Simic contact; you can decide if the contact is an ally or a rival.
Monsters
Fizban's Treasury of Dragons
, much as a forest fire clears dead wood, replenishes the soil, and allows the forest to regrow even healthier than before. To this end, topaz dragons use their power to reduce crumbling structures and
state but are hung with the dragon’s collection of nautical paintings, mirrors, and sun-colored tapestries. Numerous gold-and-glass hanging lanterns are suspended from the ceiling, giving the
Monsters
Fizban's Treasury of Dragons
creation and growth, much as a forest fire clears dead wood, replenishes the soil, and allows the forest to regrow even healthier than before. To this end, topaz dragons use their power to reduce
from the ceiling, giving the place a warm, cozy glow. (The lanterns might be magical or maintained by minions.) The floors are covered with plush sand-colored carpets.
Hoard Chamber. A small chamber in
Compendium
- Sources->Dungeons & Dragons->Dungeon Master’s Guide (2014)
. You can also use a bonus action to speak the armor’s command word and cause the armor to assume the appearance of a normal set of clothing or some other kind of armor. You decide what it looks like
reaction to reduce the damage by 1d10 + your Dexterity modifier, provided that you have a free hand. If you reduce the damage to 0, you can catch the missile if it is small enough for you to hold in
Compendium
- Sources->Dungeons & Dragons->Dungeon Master’s Guide (2014)
, start with the Trap Effects and Trap Trigger tables to decide the type of trap, then use the Trap Damage Severity tables to decide how deadly it should be. For more information on trap damage
–07 Collapsing staircase creates a ramp that deposits characters into a pit at its lower end 08–10 Ceiling block falls, or entire ceiling collapses 11–12 Ceiling lowers slowly in locked room 13–14
Compendium
- Sources->Dungeons & Dragons->Waterdeep: Dungeon of the Mad Mage
bookshelves, fully stocked with upside-down history books from the many parts of the world Halaster has explored.
Desk. In the middle of the 15-foot-high ceiling is an upside-down desk topped with a stack of
. Unless anchored, held down, or affected by a fly spell or similar magic, any creature or object that enters this room falls up toward the ceiling. The desk is empty except for the array of nine books
Compendium
- Sources->Dungeons & Dragons->Sage Advice Compendium
Adventuring Is there a hard limit on how many short rests characters can take in a day, or is this purely up to the DM to decide? The only hard limit on the number of short rests you can take is the
weapon of a dragon magical?” in the “Monsters” section below. What’s an example of an effect that can reduce exhaustion? The greater restoration spell can reduce exhaustion. Is there a way to get lost
Compendium
- Sources->Dungeons & Dragons->Dungeon Master’s Guide (2014)
as a colossal statue, towering column of stone, or massive boulder. That said, one torch can burn a Huge tapestry, and an earthquake spell can reduce a colossus to rubble. You can track a Huge or
Gargantuan object’s hit points if you like, or you can simply decide how long the object can withstand whatever weapon or force is acting against it. If you track hit points for the object, divide it into
Compendium
- Sources->Dungeons & Dragons->Curse of Strahd
through the lower levels of the house as it makes its descent. Thick cobwebs fill the shaft and reduce visibility in the staircase to 5 feet. The secret door and shaft don’t exist until the house
. Rooms are 8 feet tall and supported by thick wooden posts with crossbeams. The only exception is area 38, which has a 16-foot-high ceiling supported by stone pillars. Characters without darkvision
Compendium
- Sources->Dungeons & Dragons->Waterdeep: Dungeon of the Mad Mage
ceiling flickers, and all creatures in the chamber behind the door magically shrink as though affected by the reduce effect of the enlarge/reduce spell (no saving throw allowed). The effect lasts for
. Embedded in the wall next to the door is a brass panel with four brass buttons arranged in a diamond formation. (A similar panel appears inside the chamber.)
Light. A crystal dome in the ceiling sheds
Compendium
- Sources->Dungeons & Dragons->Waterdeep: Dungeon of the Mad Mage
features; for example, level 16, the Crystal Labyrinth, has walls, floors, and ceilings made of crystal. Ceilings It’s helpful to know the height of a ceiling, particularly if creatures in the area can
climb or fly. Rooms. A room’s ceiling is at least as high as the room is wide, often higher. If a room’s ceiling height isn’t specified in the text, assume it’s the minimum height. Tunnels. A tunnel’s
Compendium
- Sources->Dungeons & Dragons->Borderlands Quest: Goblin Trouble
for several minutes before the passage turns north and leads up a set of natural stone steps. A group of caverns continues out ahead of you.
The ceiling of these caverns is choked with webs, and the
footprints you’ve been following continue through these caves. In the center of the floor in the first cave is a human-sized boot.
The ceiling is 15 feet high, but the webs cover the top five feet of
Compendium
- Sources->Dungeons & Dragons->Dungeon Master’s Guide
. Once you decide on the spell, you must expend a spell slot of the spell’s level. Then, to determine whether you cast the spell, make an Intelligence (Arcana) check (DC 10 plus the spell’s level). On
uses your spell save DC and spell attack bonus. 1d100 Effect 01–50 You cast a random spell determined by rolling 1d10: on a 1, Enlarge/Reduce (enlarge effect); on a 2, Enlarge/Reduce (reduce effect
Compendium
- Sources->Dungeons & Dragons->D&D Beyond Basic Rules
. Once you decide on the spell, you must expend a spell slot of the spell’s level. Then, to determine whether you cast the spell, make an Intelligence (Arcana) check (DC 10 plus the spell’s level). On a
determined by rolling 1d10: on a 1, Enlarge/Reduce (enlarge effect); on a 2, Enlarge/Reduce (reduce effect); on a 3, Faerie Fire; on a 4, Fireball; on a 5, Gust of Wind; on a 6, Invisibility (cast on
Compendium
- Sources->Dungeons & Dragons->Basic Rules (2014)
stone, or massive boulder. That said, one torch can burn a Huge tapestry, and an earthquake spell can reduce a colossus to rubble. You can track a Huge or Gargantuan object's hit points if you like, or
you can simply decide how long the object can withstand whatever weapon or force is acting against it. If you track hit points for the object, divide it into Large or smaller sections, and track each
Compendium
- Sources->Dungeons & Dragons->Dragon of Icespire Peak
holes line the ceiling, enabling fortress defenders to shoot ballistas at invaders or pour boiling oil on top of them. With the dwarves gone, the only remaining defenses are the portcullis and the double
reduce the time proportionately. The noise created by smashing down the doors is loud enough to alert all the dwarf ghouls in the fortress, which gather in area A4 and attack once the doors fall. The
Compendium
- Sources->Dungeons & Dragons->Dungeon Master’s Guide (2014)
Obstacle 1 Antilife aura with a radius of 1d10 × 10 ft.; while in the aura, living creatures can’t regain hit points 2 Battering winds reduce speed by half, impose disadvantage on ranged attack rolls 3
progress and must be hacked down (25 percent chance of a mold or fungus dungeon hazard hidden among them) 17 Poisonous gas (deals 1d6 poison damage per minute of exposure) 18 Reverse gravity effect causes creatures to fall toward the ceiling 19 Wall of fire blocks passage 20 Wall of force blocks passage
Compendium
- Sources->Dungeons & Dragons->Curse of Strahd
K41. Treasury This octagonal vault is free of dust and cobwebs. The domed ceiling forty feet above is painted black and sparkles with a display of stars in unfamiliar constellations. Barely contained
within this vault is a square tower, twenty feet on a side and thirty feet high, with arrow slits on all sides and a battlemented roof. The domed ceiling is coated with dry pitch. The “stars” are
Compendium
- Sources->Dungeons & Dragons->Fizban's Treasury of Dragons
, walls, and ceiling covered in carpets of mold and moss, or featuring larger mushrooms and plants in neatly organized displays. The challenge rating of a legendary deep dragon increases by 1 when
). The spell ends early if the dragon uses this lair action again or if the dragon dies. Mossy Sludge. The dragon conjures sludge-like moss that briefly covers surfaces in the lair. The ceiling, floor
Compendium
- Sources->Dungeons & Dragons->Curse of Strahd
ceiling. Heavy beams sag overhead from centuries of supporting weight. The staircase starts at area K84 and spirals upward around a central shaft (area K18a), climbing 300 feet to the top of the high tower
can create a hole wide enough to crawl through in 1 hour, or reduce the entire wall to a pile of masonry bricks and rubble in 2 hours. Thirty feet below the masonry wall and 50 feet above the foot of
Compendium
- Sources->Dungeons & Dragons->Baldur's Gate: Descent into Avernus
repair. The creature must have the right tools for the job (smith’s tools or tinker’s tools, for example). Before beginning repairs, a creature must decide whether the repairs are aimed at ending a mishap
trying to reduce the vehicle’s exhaustion level. The vehicle must be stationary, and the creature must have spare parts to make the necessary repairs. After 1 hour of repair work, the creature makes a
Compendium
- Sources->Dungeons & Dragons->Wayfinder's Guide to Eberron
years or decades to develop a particular schema; the fact that you can accomplish this in weeks reflects the idea that player characters are innovators. However, it is always up to the DM to decide if
various factors could reduce time or cost. Eberron dragonshards are a significant amount of the cost of materials. A remarkable dragonshard could reduce the cost of creating an item by 10 percent. A
Compendium
- Sources->Dungeons & Dragons->Tomb of Annihilation
over a pulley bolted to the ceiling and coils around an iron winch set into a nearby wall. Iron manacles dangle from hooks on the south wall. To the north, a faintly glowing stone disk covers the floor
wrists and shackles on their ankles. The manacles impose disadvantage on ability checks made to climb or swim. The shackles reduce a prisoner’s walking speed by half and impose disadvantage on ability
Compendium
- Sources->Dungeons & Dragons->Dungeon Master’s Guide
Information. If you tell the players what the Armor Class of their opponents is, you reduce the steps of interaction needed to resolve an attack. Instead of telling you a number and asking if it hits
know each character’s AC, you don’t need to ask whether a monster’s attack hits. Help Players Keep Up. If a player isn’t sure what to do on their turn in combat, help the player decide by offering a
Compendium
- Sources->Dungeons & Dragons->Scions of Elemental Evil
Wizard spell list, it must be of a level you can cast, and it can’t have Material components costing more than 1,000 GP. Once you decide on the spell, you must expend a spell slot of the spell’s level
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 rolling 1d10: on a 1, Enlarge/Reduce (enlarge effect); on a 2, Enlarge
Compendium
- Sources->Dungeons & Dragons->Hold Back The Dead
Wizard spell list, it must be of a level you can cast, and it can’t have Material components costing more than 1,000 GP. Once you decide on the spell, you must expend a spell slot of the spell’s level
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 rolling 1d10: on a 1, Enlarge/Reduce (enlarge effect); on a 2, Enlarge
Compendium
- Sources->Dungeons & Dragons->Dungeon Master’s Guide
found, and that book also includes tables listing the creatures commonly found within each type of terrain. Using that information, you can decide which creatures inhabit an adventure location within a
particular environment. You can choose a range of creatures, from common vermin to sapient inhabitants and terrifying predators, and decide how they live together. Factions. Particularly in larger
Compendium
- Sources->Dungeons & Dragons->Dungeon Master’s Guide
Designing Dungeon Rooms Keep the following things in mind when designing a dungeon room: Ceiling Support. Underground chambers are prone to collapse, so many rooms—particularly large ones—have arched
sentries play a dice game, or it might be a pair of iron golems backed up by spellcasters hiding in balconies overhead. When you design a guard post, decide how many guards are on duty, note their