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This crab-like nightmare has a lamprey mouth, twitching eyes on its legs, and several blisters along its back that hold human brains.

Neh-Thalggu CR 8

XP 4,800
CE Large aberration
+7; Senses darkvision 60 ft.; Perception +17


AC 21, touch 19, flat-footed 18 (+3 Dex, +2 natural, +7 insight, –1 size)
105 (10d8+60)
+9, Ref +6, Will +11
10/magic; Immune confusion effects; SR 19


Speed 10 ft., fly 40 ft. (perfect)
bite +13 (1d8+7 plus poison), 2 claws +13 (1d6+7)
10 ft.; Reach 5 ft.
Special Attacks
rend (2 claws, 2d6+7)
Sorcerer Spells Known
(CL 7th; concentration +17)

3rd (5/day)—lightning bolt (DC 16), hold person (DC 16)
2nd (7/day)—acid arrow, alter self, invisibility
1st (7/day)—grease (DC 14), magic missile, ray of enfeeblement (DC 14), shield, unseen servant
0 (at will)—acid splash, dancing lights, detect magic, mage hand, open/close, prestidigitation, read magic


Str 24, Dex 16, Con 23, Int 19, Wis 18, Cha 17
Base Atk
+7; CMB +15; CMD 35 (cannot be tripped)
Arcane Strike, Extend Spell, Combat Reflexes, Eschew MaterialsB, Improved Initiative, Power Attack
Fly +15, Knowledge (arcana) +23, Knowledge (dungeoneering) +23, Knowledge (planes) +23, Perception +17, Sense Motive +17, Spellcraft +17, Stealth +12, Use Magic Device +16
Abyssal, Aklo, Common, Draconic, Protean, Undercommon; telepathy (100 feet)
brain collection, strange knowledge


Brain Collection (Ex)

A neh-thalggu can store up to seven humanoid brains and use them to enhance its knowledge and power. Each stored brain grants a neh-thalggu a cumulative +1 insight bonus to AC, concentration checks, and Knowledge checks. A neh-thalggu can extract a brain from a helpless opponent with a coup de grace attack, or as a standard action from a body that has been dead for no more than 1 minute. A neh-thalggu that has fewer than seven brains gains one negative level for each missing brain. These negative levels can never become permanent, but they can only be removed by replacing one of its collected brains. The stats presented here assume a monster with a full collection.

Poison (Ex)

Bite—injury; save Fort DC 21; frequency 1/round for 6 rounds; effect 1d2 Strength damage and staggered; cure 2 consecutive saves.

The save DC is Constitution-based.


A neh-thalggu casts spells as a 7th-level sorcerer. For each negative level it takes from missing brains, its caster level is reduced by 1. A neh-thalggu with no collected brains cannot cast any of its spells.

Strange Knowledge (Ex)

All Knowledge skills are class skills for neh-thalggus.