Dungeon Master's Guide 5E

d20 Obstacle

2

4-8

9-12

13-14

15

16

17

18

19

Antilife aura ."c" a r,;o usof1d1 0 x 10ft.; while in

the aura, li ·ng crea-Jres can't regain hit points

Battering winos re uce speed by half, impose

disadvantage on range d attack rolls

Blade barrier b locks oassage

Cave-in

Chasm 1d4 x 10. vide and 2d6 x 10ft. deep,

possibly connec ed to other levels of the dungeon

Flooding leaves 2d 10 ft. of water in the area; create

nearby upward-slopin g passages, raised floors, or

rising stairs to contain the water

Lava flows through the area (50 percent chance of

a stone bridge c rossing it)

O vergrown mushrooms block progress and must

be hacked down (25 percent chance of a mold or

fungus dungeon hazard hidden among them)

Poisonous gas (deals 1d6 poison damage per

minute of e xposure)

Reverse gravity effect causes creatures to fall toward

the ceiling

Wall of fire blocks passage

20 Wall of force blocks passage

RANDOM TRAPS

If you need a trap quickly or want to drop random

traps into a dungeon , use the sample traps presented

in chapter 5, "Adventure Environments" or the tables

below. If you use the tables, start with the Trap Effects

and Trap Trigger tables to decide the type of trap,

then use th e Trap Damage S everity tables to decide

how deadly it should be. For more information on trap

damage severity, see chapter 5.

TRAP TRIGGER

d6 Trigger

Stepped on (floor, stairs)

2 Moved through (doorway, hallway)

3 Touched (doorknob, statue)

4 Opened (door, treasure chest)

5 Looked at (mural, arcane symbol)

6 Moved (cart, stone block)

TRAP DAMAGE SEVERITY

d6 Damage Severity

1- 2 Setback

3-5 Dangerous

6 Deadly

TRAP EFFECTS

dlOO

01-04

05-07

08-10

11-12

,13-14

1 5-16

17 - 19

20-23

24-27

28-30

31-33

34-36

37-39

40-43

44-46

47-49

50-52

53-56

57 - 59

60-62

63-67

68-70

71-73

74-77

78-81

82-84

85-88

89-9 1

92-94

95-97

98-00

Effect

Magic missiles shoot from a statue or object

Collapsing staircase creates a ramp that deposits

characters into a pit at its lower end

Ceiling block falls, or entire ceiling collapses

Ceiling lowers slowly in locked room

Chute opens in floor

Clanging noise attracts nearby monsters

Touching an object triggers a disintegrate spell

Door or other object is coated with contact poison

Fire shoots out from wall, floor, or object

Touching an object triggers a flesh to stone spell

Floor collapses or is an illusion

Vent releases gas: blinding, acidic, obscuring,

paralyzing, poisonous, or sleep-inducing

Floor tiles are electrified

Glyph of warding

Huge wheeled statue rolls down corridor

Lightning bolt shoots from wall or object

Locked room floods with water or acid

Darts shoot out of an opened chest

A weapon, suit of armor, or rug animates and

attacks when touched (see "Animated Objects" in

the Monster Manual)

Pendulum, either bladed or weighted as a maul,

swings across the room or hall

Hidden pit opens beneath characters (25 percent

chance that a black pudding or gelatinous cube

fills the bottom of the pit)

Hidden pit floods with acid or fire

Locking pit floods with water

Scything blade emerges from wall or object

Spears (possibly poisoned) spring out

Brittle stairs collapse over spikes

Thunderwave knocks characters into a pit or spikes

Steel or stone jaws restrain a character

Stone block smashes across hallway

Symbol

Walls slide together

RANDOM TRICKS

Tricks are quirkier and less deadly than traps. Some

are effects left behind by the dungeon's creators, while

others might be manifestations of the strange magical

e nergy suffusing the dungeon.

The following tables allow you to generate random

tricks. Roll first to determine an object that the trick

is placed on, then roll to determine the nature of the

trick. Some tricks are permane nt effects that can't be

dispelled; others are temporary or can be neutralized

with a dispel magic spell. You decide which is which.

APPENDIX A I RANDOM DUNGEONS

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