Blood Amniote (CR 9)

Huge Undead
Alignment: Always neutral
Initiative: +5 (Dex); Senses: blindsight 60 ft. and darkvision 60 ft.

AC: 26 (-2 size, +5 Dex, +13 natural), touch 13, flat-footed 11
Hit Dice: 10d12 (65 hp); DR: 10/-
Fort +3, Ref +8, Will -2
Speed: 30 ft., climb 20 ft.
Space: 15 ft./10 ft.
Base Attack +7; Grapple +18
Attack: Slam +9 melee
Full Attack: Slam +9 melee
Damage: Slam 2d6+6 plus blood call
Special Attacks/Actions: Blood call
Abilities: Str 19, Dex 20, Con -, Int -, Wis 1, Cha 1
Special Qualities: fast healing 5, inescapable craving, ooze traits, self spawn, undead traits
Feats: -
Skills: -
Advancement: 11-15 HD (Huge); 16-30 HD (Gargantuan)
Climate/Terrain: Underground
Organization: Solitary, pair, or amnion (4-8)
Treasure/Possessions: None

Source: Libris Mortis

Blood Call (Su): Whenever a blood amniote strikes a living creature in melee combat, its touch causes the target's body to expel a portion of its own blood through the pores. The expelled blood gathers and flows across the intervening distance between the prey and the blood amniote. This attack deals 1d4 points of Constitution damage to the foe.

If a blood amniote deals as many points of Constitution damage during its existence as its full normal hit point total, it self spawns (see below).

Inescapable Craving: A blood amniote has an inescapable craving (see Undead Metabolism) for blood, which it satisfies by using its blood call ability.

Ooze Traits: Despite being undead, a blood amniote has all the benefits and disadvantages of being an ooze. Like oozes, blood amniotes do not receive any feats. Blood amniotes are mindless and are immune to all mind-affecting spells and abilities, and they are blind, giving them immunity to gaze attacks, visual effects, illusions, and other attack forms that rely on sight. Blood amniotes also have immunity to poison, magic sleep effects, paralysis, polymorph, and stunning, and they are not subject to extra damage from critical hits or flanking.

Self Spawn (Ex): If a blood amniote deals as many points of Constitution damage during its existence as its full normal hit point total, it self spawns, splitting into two identical blood amniotes, each with a number of hit points equal to the original blood amniote's full normal total

When a blood amniote senses potential prey, it quickly moves to engage, hoping to draw our the blood of its victims in full quantity.

The half-congealed blood of past victims gives a blood amniote its form, and its ties to the Negative Energy Plane give the creature animation. Mindless, it seeks only to pierce the fleshy carapace of all living creatures it comes upon so it can draw out the blood beneath.

Though these creatures are mindless, vestiges of past victims completely drained of blood remain imprinted on them. Observers sometimes see these random memories as faces that briefly form on the surface of a blood amniote, only to fall away again to formlessness moments later.