Huge Monstrosity (Sorcerer), Lawful Evil
AC 15 (natural armor)    Initiative +0 (10)
HP 170 (20d12 + 40)
Speed 30 ft., Swim 30 ft.
Mod Save
STR 19 +4 +4
DEX 10 +0 +0
CON 16 +3 +3
Mod Save
INT 15 +2 +2
WIS 12 +1 +1
CHA 16 +3 +3
Skills Arcana +6
Senses Darkvision 120 ft.; Passive Perception 12
Languages Common , Carcinoss
CR 11 (XP 7,200, or 8,400 in lair; PB +4)
Traits

Amphibious. The carcinoss can breathe air and water.

Multilegged. The carcinoss has advantage on saving throws to resist being moved against its will or being knocked Prone.

Legendary Resistance (1/Day). If the chieftain fails a saving throw, it can choose to succeed instead.

Actions

Multiattack. The sharpclaw makes two attacks with its Claw, Spear, or both. It can replace one attack with a use of Shell Smash if available.

Claw. Melee Attack Roll: +8, reach 10 ft. Hit: 15 (2d10 + 4) Piercing damage, and the target is Grappled (escape DC 16). The carcinoss has two claws, each of which can grapple only one target.

Spear. Melee or Ranged Attack Roll: +8, reach 5 ft. or range 20/60 ft. Hit: 13 (2d8 + 4) Piercing damage, or 15 (2d10 + 4) Piercing damage if used in two hands to make a melee attack.

Shell Smash (Recharge 4-6). The chieftain moves up to its full walking speed in one direction. Dexterity Saving Throw: DC 16, all creatures whose space the chieftain moves through. Failure: 14 (4d6) Bludgeoning damage, and the target is Prone. A Prone creature in the chieftain's path that fails this saving throw again takes 28 (8d6) Bludgeoning damage instead. Success: Half damage.

Spellcasting. The chieftain casts one of the following spells, requiring no material components and using Charisma as the spellcasting ability (spell save DC 15, to hit + 7):

At Will: Mage Hand, Frostbite, Elementalism, Prestidigitation, Acid Splash, Blade Ward

3/Day Each: Sleep, Fog Cloud

2/Day: Blight

1/Day Each: Abi-Dalzim's Horrid Wilting, Dominate Person

Bonus Actions

Reinforce (5/Day). The sharpclaw can choose to present the most fortified part of its shell against attackers, gaining a +5 bonus to its AC until this trait causes an attacking creature to miss. If this trait causes the attack to miss, that section of shell is cracked, and the next time the sharpclaw uses this trait, it gains a +4 bonus to its AC, and the bonus decreases by 1 each time this trait is used.

Reactions

Solid Shell. Trigger: The carcinoss is hit by a melee attack. Response: The damage is reduced by half (rounded down), and the other half is reflected, turning the attacker into the target.

Counterspell (2/Day). The chieftain casts Counterspell in response to the spell's trigger, using the same ability as Spellcasting.

Legendary Actions

Legendary Action Uses: 3. Immediately after another creature’s turn, the chieftain can expend a use to take one of the following actions. The chieftain regains all expended uses at the start of each of its turns.

Walk Over. Melee Weapon Attack: +8, reach 10 ft. Hit: 15 (2d10 + 4) Slashing damage, and the target is Prone.

Claw Swipe. Dexterity Saving Throw: DC 16, each creature in a 10-ft. Emanation. Failure: 10 (3d6) Bludgeoning damage, and the target is Prone. Success: Half damage. Success or Failure: The target is pushed back 5 ft.

Spellcasting. The chieftain casts one spell it knows that has a casting time of one action. The chieftain can't take this action again until its next turn.

Description

Resembling large crabs, complete with eyes on stalks and claws for hands, carcinoss rule the Neputic Ocean south of the Northern Isles. These monstrosities may have evolved from mundane crustaceans exposed to the magical malpractices of multiple mages, or simply could have been shaped by their environment into the shrewd and testy people they have come to be known as. In either case, these cantankerous shell-covered creatures are as tall as they are wide, from the 5-foot-diameter workers to the 15-foot-diameter chieftains.

Carcinosses are exceptionally vain, decorating their carapaces with other seashells, inks, corals, and dyes sourced from the resources of their vast kingdoms. Some kingdoms even choose to decorate their warriors with shell tattoos, which often are quite detailed pictograms revealing the kingdom’s rich militant history.

Usually carcinosses are content to stay on the sea floor, though recent conflicts against thanoi hunters and seaborn have forced many up toward the surface, putting their spindly legs and swimming prowess to the test. Fishermen in the areas frequented by carcinoss workers keep extra nets on hand in case of attacks, though carcinosses rarely attack boats larger than a skiff.

Carcinoss society, though looking primitive, is actually quite sophisticated, with their own tools, language, and architecture. The larger chieftains are often skilled sorcerers, fighting their way to prominence with magical acts that astound (and kill) their opposition. Due to poor eyesight, carcinosses are also very drawn to sparkly objects, which capture their fascination far better than dull ones. This also makes carcinosses one of the primary sources of pearls and fine gems south of the mines of Salamandastron. 

Lair and Lair Actions

On initiative count 20 (losing initiative ties), the carcinoss chieftain takes a lair action to cause one of the following effects; the chieftain can’t use the same effect two rounds in a row:

  • The chieftain commands its servants to release 1d6 manta ray pets into the lair, which can appear anywhere within 60 feet of the chieftain through hidden passages.
  • A hidden cache of air is released into the lair, pushing Large or smaller creatures 10 feet toward an exit. Any creature that is swimming is also pushed back. A creature pushed by the explosive current must make a DC 20 Dexterity saving throw or have disadvantage on the first ability check, saving throw, or attack roll made before the end of the creature's next turn. If the creature hits a wall or other object while being pushed, it takes 4 (1d8) Bludgeoning damage.

Previous Versions

Name Date Modified Views Adds Version Actions
3/9/2025 1:23:42 AM
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Monster Tags: monstrosity

Habitat: CoastalSwampUnderwater

TheBooksDoctor

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