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monsters aberration cr-5-10 Tome of Beasts 3

Star-Nosed Diopsid

Large Aberration, CR 9. From Tome of Beasts 3.

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Star-Nosed Diopsid

Large Aberration, lawful evil

Armor Class 16 (natural)

Hit Points 153 (18d10+54)

Speed 30 ft., burrow 15 ft., fly 30 ft.

STR
19 (+4)
DEX
14 (+2)
CON
17 (+3)
INT
17 (+3)
WIS
16 (+3)
CHA
15 (+2)

Saving Throws Con +7, Int +7, Wis +7

Skills Perception +3

Damage Immunities —

Condition Immunities —

Senses darkvision 60', tremorsense 60', passive Perception 17

Languages Deep Speech, Undercommon, telepathy 100' (300' w/its own kind)

Challenge 9 (5,000 XP)

Mutagenic Venom. Produces potent poison that envenoms Humanoid victim and slowly transforms it into new diopsid. While envenomed treats all diopsid as if charmed by them. Every 24 hrs that elapse victim : DC 16 Con save reducing hp max by 5 (2d4) on failure. Reduction lasts until creature finishes long rest after venom removed. Creature dies if this reduces hp max to 0. Humanoid that dies from this horrifically transformed becoming new diopsid and losing all memory of its former life. Poison remains within creature's body until removed by greater restoration or similar.

Actions

Multiattack. One Stinger attack and two Tentacle attacks.
Stinger. Melee Weapon Attack: +8 to hit, 5 ft., one target, 26 (4d10+4) piercing damage. If Humanoid succumbs to diopsid's venom (DC 16 Con negates see Mutagenic Venom).
Tentacle. Melee Weapon Attack: +8 to hit, 10 ft., one target, 17 (3d8+4) bludgeoning damage. Target is grappled (escape DC 16) if it is an up to Large creature and diopsid doesn't have 2 grappled.
Share Senses. While within 300' of an envenomed Humanoid diopsid sees through target's eyes and hears what target hears until start of its next turn gaining benefits of any special senses target has. On subsequent turns diopsid can use a bonus action to extend duration of this effect until start of its next turn.
Control Envenomed (3/Day). While within 300' of an envenomed Humanoid diopsid can telepathically suggest course of activity to it. Humanoid must make DC 16 Wis save or pursue the activity suggested to it. Success: Humanoid takes 11 (2d10) psychic and has disadvantage next time it makes this save. Works like suggestion spell and Humanoid unaware of diopsid's influence.

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