Hollow Serpent

Crafted from the shed skins of great snakes by serpentfolk necromancers and other foul spellcasters, hollow serpents are plagued by an eternal hunger they can never sate. The act of draining energy from living creatures blunts these supernatural pangs, driving the hollow serpent to constantly seek new prey.

A hollow serpent is a difficult undead to create—most of them were crafted by a long-forgotten god of the serpentfolk and not by mortal spellcasters at all. The exact methods by which a mortal might create a hollow serpent are obscure, but most scholars have come to the conclusion that the use of powerful artifacts or the aid of a demigod may be required for such a feat.

A hollow serpent is 15 feet long and weighs 500 pounds.

Channel Negative Energy — As a standard action, a hollow serpent can channel negative energy in a 30-foot burst as a 16th-level evil cleric. This ability requires no divine focus. The save DC is Charisma-based.

constrict (4d10+10 plus energy drain)

energy drain (1 level, DC 26)

Life-Draining Coils — A hollow serpent seethes with negative energy capable of sapping the life force of creatures trapped within its coils. Every time a creature takes constriction damage from a hollow serpent, it gains one negative level. The hollow serpent also gains 5 temporary hit points for each negative level it bestows.

Swift Strike — When a hollow serpent takes a full-attack action, it can make two bite attacks instead of just one.

Agile Maneuvers, Channel Smite, Dodge, Great Fortitude, Iron Will, Lightning Reflexes, Lunge, Toughness, Vital Strike, Weapon Finesse

Climb +28, Escape Artist +19, Perception +17, Stealth +18