Kassoon

Darkmantle

Small monstrosity, unaligned
Armor Class 11
Hit Points 22 (5d6+5)22 (5[d6+5])
Speed 10ft., fly 30ft.
STR
16 (+3)
DEX
12 (+1)
CON
13 (+1)
INT
2 (-4)
WIS
10 (+0)
CHA
5 (-3)

Saving Throws
Skills Stealth +3 Stealth +3
Damage Vulnerabilities
Damage Resistances -
Damage Immunities
Condition Immunities
Senses blindsight 60ft., passive Perception 10blindsight 60ft., passive Perception 10
Languages -
Challenge 1/2 (100 XP)

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Echolocation. The darkmantle can't use its blindsight while deafened.
False Appearance. While the darkmantle remains motionless, it is indistinguishable from a cave formation such as a stalactite or stalagmite.

[b]Echolocation.[/b] The darkmantle can't use its blindsight while deafened.
[b]False Appearance.[/b] While the darkmantle remains motionless, it is indistinguishable from a cave formation such as a stalactite or stalagmite.

Actions

Crush. Melee Weapon Attack: +5 to hit, reach 5 ft., one creature.
Hit: 6 (ld6+3) bludgeoning damage, and the darkmantle attaches to the target. If the target is Medium or smaller and the darkmantle has advantage on the attack roll, it attaches by engulfing the target's head, and the target is also blinded and unable to breathe while the darkmantle is attached in this way.
While attached to the target, the darkmantle can attack no other creature except the target but has advantage on its attack rolls. The darkmantle's speed also becomes 0, it can't benefit from any bonus to its speed, and it moves with the target.
A creature can detach the darkmantle by making a successful DC l3 Strength check as an action. On its turn, the darkmantle can detach itself from the target by using 5 feet of movement.
Darkness Aura (1/Day). A 15-foot radius of magical darkness extends out from the darkmantle, moves with it, and spreads around corners. The darkness lasts as long as the darkmantle maintains concentration, up to 10 min utes (as if concentrating on a spell). Darkvision can't penetrate this darkness, and no natural light can illuminate it. If any of the darkness overlaps with an area of light created by a spell of 2nd level or lower, the
spell creating the light is dispelled.

[b]Crush.[/b] Melee Weapon Attack: [+5] to hit, reach 5 ft., one creature.
Hit: 6 (l[d6+3]) bludgeoning damage, and the darkmantle attaches to the target. If the target is Medium or smaller and the darkmantle has advantage on the attack roll, it attaches by engulfing the target's head, and the target is also blinded and unable to breathe while the darkmantle is attached in this way.
While attached to the target, the darkmantle can attack no other creature except the target but has advantage on its attack rolls. The darkmantle's speed also becomes 0, it can't benefit from any bonus to its speed, and it moves with the target.
A creature can detach the darkmantle by making a successful DC l3 Strength check as an action. On its turn, the darkmantle can detach itself from the target by using 5 feet of movement.
[b]Darkness Aura (1/Day).[/b] A 15-foot radius of magical darkness extends out from the darkmantle, moves with it, and spreads around corners. The darkness lasts as long as the darkmantle maintains concentration, up to 10 min utes (as if concentrating on a spell). Darkvision can't penetrate this darkness, and no natural light can illuminate it. If any of the darkness overlaps with an area of light created by a spell of 2nd level or lower, the
spell creating the light is dispelled.

Legendary Actions

 

Details

A darkmantle clings to cavern ceilings, remaining perfectly still as it waits for creatures to pass beneath it. From a distance, it can pass itself off as a stalactite or a lump of stone. Then it drops from the ceiling and unfurls, surrounding itself with magical darkness as it engulfs and crushes its prey.
Darkmantles are found throughout the Underdark, but they are equally common on the Shadowfell. Thriving in that dark realm, they fill an ecological niche similar to
bats on the Material Plane. Intelligent creatures of the Shadowfell sometimes train darkmantles as guardians or companions.
A darkmantle clings to cavern ceilings, remaining perfectly still as it waits for creatures to pass beneath it. From a distance, it can pass itself off as a stalactite or a lump of stone. Then it drops from the ceiling and unfurls, surrounding itself with magical darkness as it engulfs and crushes its prey.
Darkmantles are found throughout the Underdark, but they are equally common on the Shadowfell. Thriving in that dark realm, they fill an ecological niche similar to
bats on the Material Plane. Intelligent creatures of the Shadowfell sometimes train darkmantles as guardians or companions.
 
Source Monster Manual, p.46
 
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Tactics
 
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Monster Statistics by Challenge Rating

CRProf. BonusACHPAttack BonusDamage / RoundSave DC
0+2<131-6<+30-1<13
1/8+2137-35+32-313
l/4+21336-49+34-513
1/2+21350-70+36-813
1+21371-85+39-1413
2+21386-100+315-2013
3+213101-115+421-2613
4+214116-130+527-3214
5+315131-145+633-3815
6+315146-160+639-4415
7+315161-175+645-5015
8+316176-190+751-5616
9+416191-205+757-6216
10+417206-220+763-6816
11+417221-235+869-7417
12+417236-250+875-8017
13+518251-265+881-8618
14+518266-280+887-9218
15+518281-295+893-9818
16+518296-310+999-10418
17+619311-325+10105-11019
18+619326-340+10lll-11619
19+619341-355+10117-12219
20+619356-400+10123-14019
21+719401-445+11141-15820
22+719446-490+11159-17620
23+719491-535+11177-19420
24+719536-580+12195-21221
25+819581-625+12213-23021
26+819626-670+12231-24821
27+819671-715+13249-26622
28+819716-760+13267-28422
29+919761-805+13285-30222
30+919806-850+14303-32023

Damage Severity by Level

LevelSetbackDangerousDeadly
1-41d102d104d10
5-102d104d1010d10
11-164d1010d1018d10
17-2010d1018d1024d10

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