Spirit Constrictor (CR 6)

Huge Outsider (Native)
Alignment: Always Neutral
Initiative: +3 (Dex); Senses: darkvision 60 ft., scent, Listen +23, and Spot +23


AC: 15 (-2 size, +3 Dex, +4 natural), touch 11, flat-footed 12
Hit Dice: 11d8+11 (60 hp)
Fort +8, Ref +10, Will +10
Speed: 40 ft., climb 20 ft., swim 20 ft.
Space: 15 ft./10 ft.
Base Attack +11; Grapple +26
Attack: Head +16 melee or tail slap +16 melee
Full Attack: Head +16 melee and tail slap +11 melee
Damage: Head variable, tail slap 1d8+10
Special Attacks: Constrict 1d8+10, improved grab, summon snakes, survive headlessness, variable head
Abilities: Str 25, Dex 17, Con 13, Int 4, Wis 16, Cha 13
Special Qualities: immunity to cold, death magic, mind-affecting spells and abilities, poison, and sleep, rejuvenation, survive headlessness
Feats: Alertness, Endurance, Skill Focus (Hide), Track,
Skills: Climb +15, Hide +22, Listen +23, Move Silently +17, Spot +23, Survival +17, and Swim +15
Advancement: 12-16 HD (Huge); 17-33 HD (Gargantuan)
Climate/Terrain: Warm or temperate forests
Organization: Solitary
Treasure/Possessions: None

Source: Converted

This creature appears to be made entirely of pure glass. Its body is that of a giant constrictor snake, but its head clearly belongs to a different creature altogether.

A spirit constrictor, also known as a "headless avenger", is the result of a decapitated giant constrictor snake transformed by woodland deities into an immortal spirit of vengeance.

A spirit constrictor 40 feet long and weighs around 2,500 pounds.

Combat

A spirit constrictor lashes out with its tail, attempting to catch victims in its crushing coils, while utilizing whatever natural attacks and special powers are available with its current head.

Constrict (Ex): On a successful grapple check, a spirit constrictor deals 1d8+10 points of damage.

Improved Grab (Ex): To use this ability, a spirit constrictor must hit with its tail slap attack. It can then attempt to start a grapple as a free action without provoking an attack of opportunity. If it wins the grapple check, it establishes a hold and can constrict.

Rejuvenation (Ex): If a spirit constrictor is killed its body vanishes. If the constrictor succeeds on a DC 16 level check, it reappears at the site of its death 2d4 days later, alive and fully healed, even if its previous death completely destroyed its body.

Summon Snakes (Sp): Once per day a spirit constrictor can summon its young, which have also been transformed into living glass. This summons 2d4 constrictor snakes with a +10 racial bonus on Hide checks. This ability is the equivalent of a 4th-level spell.

Survive Headlessness (Ex): A spirit constrictor does not need a head to live. It can be decapitated by a vorpal weapon and will not automatically die, although it can still be killed by the normal damage from a decapitating blow. A spirit constrictor can sense its surroundings without penalty while headless.

Variable Head (Ex): A spirit constrictor always bears the head of its last victim. When encountered and the last victim isn't known, roll 1d6 to randomly determine the current head of a spirit constrictor.

Skills: Spirit constrictors have a +4 racial bonus on Listen and Spot checks, a +8 racial bonus on Balance and Climb checks, and a +10 racial bonus on Hide checks due to its transparent body. A snake can always choose to take 10 on a Climb check, even if rushed or threatened. Snakes use either their Strength modifier or Dexterity modifier for Climb checks, whichever is higher. A snake has a +8 racial bonus on any Swim check to perform some special action or avoid a hazard. It can always choose to take 10 on a Swim check, even if distracted or endangered. It can use the run action while swimming, provided it swims in a straight line.

In the Realms

The original spirit constrictor arose around 30 years ago along the Moonsea Ride in Mistledale. A band of drunken ogres brutally slaughtered a giant constrictor snake and her newborn young, lopping off her head with a battle axe. Woodland deities guided the ogres toward the territory of a starving red dragon, then resurrected the constrictor to avenge the death of her offspring. To this day, the constrictor haunts the region.