Grognard's Grimore: Ulthai

Ulthai (Gloom Kraken) (Old School Essentials)

An ulthai by Jason Sholtis

An ulthai is a frightening, cephalopod with eight 12-foot arms covered in barbs. Originally native to the deep caves beneath the Enu Esari Highlands of central Elagal, these creatures have since become a widespread menace. Paranoid sorcerers bind ulthai to guard treasures in subterranean lakes and other bodies of water by means of a ritual first set down in the Had Anura. If an ulthai loses half or more of its arms, it will flee beneath the water, attacking again only if it is pursued or to defend any treasure it has been bound to guard.

AC 2 [17], HD 10 (44hp), Att 8 × arms (1d8 + constriction) or bite (1d10), THAC0 11 [+8], MV 90' (30'), SV D6 W7 P8 B8 S10, ML 10, AL Matter, XP 900, NA 1 (1), TT None (see above) 

• Constriction: Arms grab and constrict after a hit. Each constricting arm inflicts: 1d8 automatic damage per round, plus a –1 penalty to attacks.
• Severing Arms: Requires a hit with a cutting weapon inflicting 8 or more damage.  
• Vulnerability to Magical Light: Light deals 2d6 damage if cast upon an ulthai, while continual light deals 4d6 damage. A successful saving throw versus spells indicates half damage.