Mordenkainen's Tome of Foes

• A green
  slime (see the Dungeon Master's Guide) ap-

pears on a spot on the ceili ng that

j uiblex chooses

within the lair. The slime disintegrates after 1 hour.

REGIONAL EFFECTS

The region containing j uiblex's

lair is warped by its

magic, creating on

e or more of the following effects:

S mall bodies of wate r, suc

h as ponds or wells, withi n

1 mile of the lair turn h ighly acidic, corroding any ob-

ject that touches them.

Surfaces within 6 miles of the lair are frequently cov

• 
  

ered by a thin film

of slime, which is slick a nd sticks to

anything that touches

it.

If a humanoid

spends at least 1 hour within 1 mile

of the lair, that creature must succeed on a DC

18

Wisdom saving throw or descend into a m

adness

deter mined by the Madness of Juiblex

table. A

creatur

e that s ucceeds on thi s saving throw can't be

affecte

d by this regional effect again for 24 hours.

jUIBLEX

Huge fiend (demon), chaotic evil

Armor Class 18 (nat ural armor)

Hit Points 350 (28d12 + 168)

Speed 30 ft.

STR

24 (+7)

DEX

10 (+O)

CON

23 (+6)

INT

20 (+5)

Saving Throws Dex +7, Con +13, Wis +12

Skills Perception +12

Damage Resistan

ces cold, fire, lightning

WIS

20 (+S)

..

CHA

16 (+3)

Damage Immun

it ies poison; bludgeoning, piercing, and

slashing that is nonmagical

Co ndit ion Immunities blinded, charmed,

deafened, exhaustion,

frightened, grappled, paralyzed,

petrified, poisoned, prone,

restrained, stunned, unconscious

S e nse s truesight 120

ft., passive Perception 22

Languages all,

telepathy 120 ft.

Challenge 23 (5 0 ,000 XP)

Foul

. Any creature, other than an ooze, that s ta rts its turn

within 10 feet of Juiblex must succeed on a DC 21 Constit ution

saving throw or be poisoned un

til the start of the creature's

next turn.

Innate

Spellcasting. juiblex's spellcasting ability is Charisma

(spell

save DC 18, +10 to hit with spell attacks). )uible x can

innately cast th e following spells,

requiring no material

components:

At will: acid

splash (17th level), detect magic

3/day eac h:

blight, contagion, gaseous form

Legendary Resistance (3/Day). If )uiblex fails a s aving

throw, it

can choose to s ucceed instead.

Magic Resistance. juiblex has advantage on saving throws

against spells and other magical effects.

Magic Weapons. juiblex's weapon attacks

are magical.

If juiblex dies, these effects fade over

the course of

ldlO days.

MADN ESS O F juIBL_ E _x _

If a c

reature goes mad in juiblex's lair or within line of

sight of the demon lord , roll on the

Madnes s of Juiblex

table to determine the nature of the

madness, which is

a character flaw that lasts unt

il cured. See the D ungeon

Master's Guide for more on

madness.

MADNESS OF jUIBLEX

dlOO Flaw (lasts until cured)

01-20 "I must consume eve rything

I can!"

21-40 "I refuse to part with any

of my possessions."

41- 60 "I'll do everything I can to get o thers to eat and

drink beyond their normal limits."

61-80 " I must possess as many ma te rial goods as I can."

81 - 00 "My personality is irreleva nt.

I am defined by what

I consume."

Regeneration. )uiblex regains 20 hit points at the s tart of its

turn. lfit takes fire

or radiant damage, this trait doesn't func-

tion at th e start of it s next turn. Juiblex di es only if it

starts its

turn with 0

hit points and doesn't regenerate.

Spider Climb. )uiblex can

climb difficult surfaces, including

upside do wn on ceilings,

without needing to make a n

a bility check.

ACT

IONS

Multiattack. )uiblex makes three acid lash attacks.

Acid Lash. Melee Weapon Attack: +14 to hit, reach 10 ft., one

target. Hit: 21 (4d6 + 7) acid damage. Any creature killed by

this attac k is drawn

into Juiblex's body, and the corpse is oblit-

erated after l minute.

Eject Slime (Recharge 5-6). Juiblex spews o ut a corrosive slime,

targeting one creature that it can see within 60 feet of it. T he

ta rge t must make a D

C 21 Dexterity saving throw. O n a failure,

the target takes 55 (lOdlO) acid damage. Unless the

target

avoids taking a

ny of this damage, any metal armo r worn by the

target ta kes a

permanent -1 penalty to the AC it offers, and

any m etal weapon it 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 -5, the object is destroyed.

LEGENDARY ACTIONS

Juiblex can take 3 legenda

ry actions, choosing from the options

be low. Only one legendary action option can be used a t a

time

a nd only at the end of anothe r creature's turn. )uible

x regains

s pe nt l egenda

ry ac tio ns at t he s tart of its t urn.

Acid Splash. )uiblex casts acid splash.

Attack. Juiblex makes one acid lash attack.

Corrupting Touch

(Costs 2 Actions). Melee Weapon AUack: + 14

to hit,

reach 10 ft., one creature. Hit: 21 (4d6 + 7) poison

damage, and the target is slimed. Until the slime is scraped

off with an action, the target is

poisoned, and any creature,

other tha n an ooze, is poisoned

while within 10 feet of

the ta rget.

CHAPTER 6 I BESTIARY