Large Elemental, Chaotic Evil
Armor Class 17 Natural
Hit Points 270 (30d10 + 120)
Speed 40 ft.
STR
22 (+6)
DEX
14 (+2)
CON
18 (+4)
INT
3 (-4)
WIS
14 (+2)
CHA
18 (+4)
Saving Throws CON +10, WIS +8
Damage Vulnerabilities Thunder
Damage Resistances Acid, Cold, Fire, Lightning
Senses Truesight, Passive Perception 12
Languages A black cyst cannot speak but understands telepathic instructions from Tharizdun or Shothragot
Challenge 18 (20,000 XP)
Proficiency Bonus +6
Traits

Innate Spellcasting. The Black Cyst is an innate spell caster. Its spellcasting ability is Charisma (spell save DC 19, +10 to hit with spell attacks). The Black Cyst can cast the following spells innately:
At Will: Misty Step, Hideous Laughter
1/day: Power Word Stun

Regeneration. A Black Cyst regains 10 hit points at the start of its turn. If it takes thunder damage, this trait doesn’t function at the start of its next turn. A Black Cyst dies only if it starts his turn with 0 hit points and doesn’t regenerate.

Actions

Multiattack. The Black Cyst makes three attacks using its Tentacle

Tentacle. Melee Weapon Attack: +6 to hit, reach 15 ft., one target. Hit: 20 (2d12 + 7) bludgeoning damage. Additionally, creatures hit by this attack must make a DC19 Will Saving Throw or become poisoned until the end of the Black Cyst's next turn.

 

Reactions

Spawn Elementals (1/Day). When first reduced to 180 hitpoints or less, the black cyst summons up to three elementals and loses 30 hit points for each elemental summoned. They may be any combination of fire elemental, water elemental, earth elemental, or air elemental.  Summoned elementals have maximum hit points, appear within 100 feet of the Black Cyst, and disappear if Black Cyst is reduced to 0 hit points.

Description

A black cyst is a monstrous creation of Tharizdun, an idiotic servant that exists only to spread the ill-will of the Dark God and destroy all living things.

MattBitner

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