The term "extraterrestrial" is used to describe creatures from other worlds. Extraterrestrials capable of space travel can be encountered almost anywhere. Some present themselves as friendly explorers, while others are interested primarily in conquest or colonization. Others are simply predators that make their way from one world to another.
"Extraterrestrial" is an inherited template that can be added to any living creature (referred to hereafter as the "base creature"). The creature retains its original type. It uses the base creature's statistics and special abilities except as noted here.
Challenge Rating: Same as base creature, with modifiers as noted under Special Qualities, below. If the total CR modifier is a fraction, round up or down to the nearest whole number; for example, an extraterrestrial that gains a breath weapon (+2/3 CR), improved natural armor (+1/3 CR), and power resistance (+1/3 CR) has a total CR modifier of +1.
Speed: The extraterrestrial can replace one of the base creature's modes of movement for another, gaining the ability to burrow, climb, fly, or swim.
Burrow: The extraterrestrial can burrow at a speed equal to one-half its base land speed.
Climb: The extraterrestrial can climb at a speed equal to its base land speed. It also gains a +8 species bonus on Climb checks.
Fly: The extraterrestrial has wings and can fly at twice the speed of its base land speed (poor maneuverability).
Swim: The extraterrestrial can swim at a speed equal to its base land speed. It also gains a +8 species bonus on Swim checks.
Special Qualities: An extraterrestrial retains all the special qualities of the base creature. It may also gain one or more special qualities, chosen from the following list:
Special Quality
CR Modifier
Acidic blood
Breath weapon
Damage reduction 5/-
Death cloud
Energy resistance 10
Fast healing 5
Improved natural armor
Poisonous bite
Power resistance
Acidic Blood (Ex): The extraterrestrial has acidic blood. Each time it takes damage, it deals acid damage to all adjacent creatures and objects as it splatters its blood on them. The amount of damage equals 1d6 per 3 Hit Dice of the creature (rounded down), to a maximum of 5d6 points. A successful Reflex save (DC 15) halves the damage. Acidic blood increases the creature's CR by +1/3.
Blindsight (Ex): Blindsight increases the creature's CR by +1/3.
Breath Weapon (Su): Once every 1d4 rounds, the extraterrestrial can breathe a 30-foot cone of cold or fire, or a 60-foot line of acid or electricity. The breath weapon deals damage of the appropriate energy type to all opponents within the effect, and the amount of damage is equal to 1d6 per Hit Dice of the creature, to a maximum of 15d6 points. Targets who make a successful Reflex save (DC 10 + 1/2 creature's HD + creature's Con modifier) take half damage. A breath weapon increases the creature's CR by +2/3.
Damage Reduction (Ex): The extraterrestrial gains damage reduction 5/-. Damage reduction increases the creature's CR by +2/3.
Death Cloud (Ex): When it dies, the extraterrestrial expels a cloud of poisonous gas that fills its fighting space and all squares within 10 feet. Any creature in the cloud must succeed in a Fortitude save (DC 10 + 1/2 the dead creature's Hit Dice + the dead creature's Con modifier) to negate the initial and secondary effects (1d6 points of Constitution damage each). The death cloud increases the creature's CR by +2/3.
Energy Resistance (Ex): The extraterrestrial gains resistance 10 to one type of energy (acid, cold, electricity, fire, or sonic/concussion). Energy resistance increases the creature's CR by +1/3.
Fast Healing (Ex): The extraterrestrial has fast healing 5. Fast healing increases the creature's CR by +2/3.
Improved Natural Armor (Ex): Increase the base creature's natural armor by +3. This increases the creature's CR by +1/3.
Poisonous Bite (Ex): The extraterrestrial's bite attack is poisonous. (Only creatures with a natural bite attack can gain this ability.) A successful Fortitude save (DC 10 + 1/2 the creature's Hit Dice + the creature's Con modifier) negates the effect. The poison's damage can vary, as shown below; either roll randomly or choose the type that best suits the creature. A poisonous bite increases the creature's CR by +2/3.
Roll d% Initial Damage Secondary Damage
01-17 1d6 Str 1d6 Str
18-34 1d6 Dex 1d6 Dex
35-50 1d4 Con 1d4 Con
51-67 2d4 Wis 2d4 Wis
68-84 2d4 Cha 2d4 Cha
85-100 None Paralysis 1d6 hours
Power Resistance (Ex): The extraterrestrial gains power resistance equal to its Hit Dice. Power resistance increases the creature's CR by +1/3.
Psionics (Sp): The extraterrestrial gains the use of one psionic power of 2nd level or lower. It can use this power three times per day. This ability increases the creature's CR by +1/3.
Scent (Ex): This ability increases the creature's CR by +1/3.
Feats: An extraterrestrial may replace one of the base creature's feats with the Planetary Adaptation feat. If the base creature has no feats, it does not gain Planetary Adaptation as a bonus feat.