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This maggotlike creature has a long tail covered with frightening hooked suckers.

Grimslake CR 6

XP 2,400
CE Large aberration (extraplanar)
Init +5; Senses darkvision 60 ft., tremorsense 30 ft.; Perception +13


AC 19, touch 10, flat-footed 18 (+1 Dex, +9 natural, –1 size)
hp 68 (8d8+32); fast healing 5
Fort +6, Ref +5, Will +10
Defensive Abilities slashing scales; Immune disease; Resist acid 10, fire 10


Speed 20 ft., burrow 20 ft., climb 20 ft.
Melee bite +12 (2d6+7 plus grab), sting +12 (1d6+7 plus grab)
Space 10 ft.; Reach 10 ft.
Special Attacks constrict (1d6+6), marrow drain, penetrating jaws
Spell-Like Abilities (CL 6th; concentration +6)

3/daydeath knell (DC 12), ray of exhaustion (DC 13)
1/dayslow (DC 13)


Str 24, Dex 13, Con 19, Int 6, Wis 14, Cha 11
Base Atk +6; CMB +14 (+18 grapple); CMD 25 (can't be tripped)
Feats Improved Initiative, Iron Will, Lightning Reflexes, Step Up
Skills Climb +26, Perception +13
Languages Abyssal


Marrow Drain (Ex)

A grimslake's tail is covered with suckers that extend long, thin, razor-sharp tendrils to drill into its victim's bones, draining them of marrow. As a swift action, a grimslake can drain marrow from a creature it is grappling or from a helpless creature. The victim can resist this painful attack with a successful DC 18 Fortitude save; otherwise, the creature becomes staggered from the horrific agony for 1 round and takes 1 point of Constitution drain. The save DC is Constitution-based.

Penetrating Jaws (Su)

A grimslake's bite attack penetrates cold iron and silver damage reduction.

Slashing Scales (Ex)

The scales running in a line down a grimslake's back have razor-sharp ridges and spines, and the creature is adept at lashing at attackers with these scales. Any creature that attacks a grimslake with a natural weapon, unarmed strike, or light weapon must succeed at a DC 15 Reflex save or take 1d4 points of slashing damage. The save DC is Dexterity-based.