Starfinder: Xenomorph Arachnid

Chris Van Deelen

Xenomorph Arachnid (Combatant) CR 2 XP 600

Neutral small aberration

Init +8; Senses Blindsight (sound) 60 ft.; Perception +7


Defense                                                             HP 25

EAC 13; KAC 15

Fort +4; Ref +4; Will +3

Defensive Abilities Acid blood, acid splash; immunities Acid, cold, vacuum

Weaknesses Vulnerability to fire



Speed 30 ft.

Melee Bite, +10 (1d6+4 P) or two claws +6, (1d4+4 plus grab S)

Offensive Abilities Grab, inner jaw, poison bite



Str +2; Dex +4; Con +1; Int -4; Wis -2; Cha -2

Skills Acrobatics +7, athletics +7, stealth +22

Feats Improved Initiative

Languages None

Other Abilities Camouflage, stalker, webbing

Gear None



Environment Any

Organization small groups (2d3), medium groups (3d4) or large groups (6d4)


Special Abilities

Acid blood (Ex) The blood of the Xenomorph is highly acidic. Whenever it bleeds, the blood will burn through almost any substance and will cause 1d6+2 points of damage. The blood will continue to burn for 1d6+6 rounds, causing damage each round. Attacking the Xenomorph with natural weapons is a very poor idea.

Acid Splash (Ex) Whenever the Xenomorph is hit by any type of attack which deals more than 10 points of damage in a single strike; the blood will have a chance to effect anyone near. The acid splash has a radius of 20 ft. and those caught in the area of effect are allowed a Ref save (DC 11) to avoid taking damage. If the save fails, the victim will suffer 1d6+2 points of damage per round, for 1d6 rounds.

Camouflage (Ex) The creature possesses an exoskeleton, which allows it to become effectively invisible when viewed. This gives it a +10 bonus to Stealth, and is considered to be invisible when targeting in combat. It can turn this ability on and off as a standard action and can use it as many times a day as it needs.

Grab (Ex) When the Xenomorph happens to be within range of a hive, it will often attempt to grab and drag a victim back to the hive to be cocooned and impregnated. The creature must make a claw attack, it will do normal damage. If the attack roll successfully hits the target’s KAC +4, the creature automatically grapples the foe as a free action. (If it hits the targets KAC +13, it instead pins the target). If it succeeds, the creature will then drag the victim back to the hive to be used as a host. The victim can attempt to break free while grappled, requiring a successful escape (using the acrobatics skill). If the victim turns out to be ‘troublesome’ the creature can opt to bite in order to make the target more ‘compliant’.

Inner Jaw (Ex) Possessing an additional ‘jaw’ the creature can opt to use this attack. It typically will use this on a grappled target, or it can opt to use this in addition to the bite. The bite does slightly less damage (1d4+4 S) but is more accurate. The creature has a +13 with this particular attack, and if the target is grappled, then the bonus is +16.

Poison bite (Ex) The Xenomorphs bite injects paralytic poison into the victim. The victim must make a Fort save (DC 11) or become paralyzed for 1d4 hours. The creature can use this poison with every bite.

Natural Weapons (Ex) Cannot be disarmed.

Vulnerability to fire (Ex) The creature has few vulnerabilities, and fire is one. Whenever it encounters fire, the creature will take an additional 50% damage (rounded to nearest) and suffer a -4 to any saving throws involving fire.

Webbing (Ex) Once a victim has been paralyzed, the creature can produce a thick resin-like web, which is the same material used in the construction of the hives. The creature can fully cocoon a medium sized creature in 4+1d6 rounds. Smaller creatures will take significantly less time, while larger creatures will take more (a large creature would require 4+3d6, huge 4+6d6 and so forth). In order to escape these webs requires an acrobatics (escape) with a DC of 18. If the victim has help, they can escape in only a minute or less. It requires 1d10 rounds to successfully extract oneself from the webbing – if the escape roll succeeds.


One of the smallest variant of the Xenomorph, the Arachnid is the result of the combination of the Xeno and spider DNA. Somewhere there had to be a species of spider large enough for the Facehugger to attach and implant an embryo, and this is the result.

An arachnophobias worst nightmare come to life.

The average member of this variant is about three feet in diameter, significantly smaller than the other types. It has the ability to blend into its surroundings, becoming invisible until it attacks, making an already deadly creature far worse.

The variant has the typical eight legs, but they seem to be growing out of the elongated skull; as there appears to be no actual torso on this creature. Also, this variant does not possess an actual tail, although it does have spinnerets located at the rear of the skull, where it can produce the same type of resin, which is used in the construction of the hives.

A favorite tactic of these particular Xenomorphs is to lay in ambush, hiding among any type of cover, or even in clusters of eggs. They will always wait for prey to pass before they will reveal themselves and attack, and they always wait until they have flanking and can swarm a target or group of targets.

Their bite makes them one of the deadlier versions, as it contains a paralytic poison, which they use to great effect, paralyzing targets before either dragging them back to the hive for implantation, or they will simply use their webbing ability to cocoon the target where it lays and just lead Facehuggers to its location for implantation.

Starfinder Creature Index

Chris Van Deelen is the creator and contributor to over half of the Wisdom from the Wastelands series, contributor to the Swords of Kos: Hekaton anthology. He also wrote Creatures of the Tropical Wastelands, and 100 Oddities found in a Car. As prolific as he is, Chris Van Deelen continues to write and produce material which will be in publication soon. Not only is he a prolific content creator, he also has a wide selection of fiction and stories! If you like his work, please follow his personal author page on Facebook and on Twitter to keep up with his latest news and game content.