Hit Dice: 2 (9 hit points average)
Armor Class: 3 
Attacks: 1 bite, for damage see below
Base Attack: +2
Saving Throw: 16
Special: Paralyzation, Drain Constitution, Immune to Sleep and normal weapons
Challenge Level/XP: 5/240
Shadow Strikers, are a strange aberration of necromantic and phantasmal energies, that have been around for untold ages. In their natural form, they appear to be living snake shaped shadows.
They live within the shadows of the natural world, flitting from one shadowed area to another, always staying out of fully lit areas whenever possible. If they must venture into an area without shadow, they will form an illusionary snake form to slither under, acting as its shadow. If this illusionary form is dispelled, either by dispel magic, or having Light cast upon it, the Shadow Striker will flee to the nearest substantial source of shadow, to take refuge. Shadow Strikers are completely invisible in shadows and make no noise.
Strikers are immune to the effects of Sleep, and normal weapons. They are affected by Snake Charm.
A Shadow Striker attacks by "biting" its victim, forcing a Save vs Paralyzation or the target collapses for the duration of the attack, becoming incapable of any voluntary motor functions. The Striker then drains one point of Constitution per round, up to the total hit points the Striker has when at full health. Should the victim is drained to a Constitution of 0, they must make a System Shock roll or die. A successful System Shock roll means they lapse into a coma for 2-7 (1d6+1) hours, after which they regain consciousness with full Constitution.