Starfinder: Acid Spewer Arachnid

Chris Van Deelen

Acid-Spewer Arachnid Combatant CR 3 XP 800

Neutral medium vermin

Init +2; Senses: Darkvision 60 ft.; Perception +8


Defense                                                             HP 40

EAC: 14; KAC: 16

Fort: +7 (+17); Ref: +5; Will: +2

Defensive Abilities: Damage reduction 3 / -, hardened survivor; Immunities: Acid, Poison, radiation

Weakness: Acid explosion



Speed: 40 ft.

Melee: 2 claws  +7 (1d6+7  S), or one bite (1d4+7 A & P, crit acid burn 1d4 for 1d3 rounds)

Ranged: Acid spit +11 (1d8+3 Acid Crit 1d6 for 1d3 rounds)

Offensive Abilities: Acid stream



Str +4; Dex +2; Con +1; Int -; Wis +0; Cha +0

Skills:  Athletics +13, stealth +8

Feats: Improved initiative

Languages: None



Environment: Any

Organization: Solitary, patrols (1d4+2), or fire support squads (2d4+4),


Special Abilities

Acid explosion (Ex): If the Acid Spewer is killed by piercing or slashing attacks, it will explode. A spray of acid will cover anything within a 20 foot radius, causing 2d6+3 points of acid damage. Anything in the area of effect is allowed a Ref save (DC 12) for half damage.

Acid Stream (Ex): Once every 3 rounds the Acid Spewer can shoot a cone of acid. This cone has a 30 foot range and is 10 feet wide. Anything caught in the cone is allowed a Ref save (DC 12) or suffer 2d6+3 acid damage. A successful save reduces the damage by half.

Hardened Survivor (Ex): The Acid-spewer is completely immune to poisons and radiation, and it is able to withstand extreme conditions, even utter vacuum. Whenever the beast must make a saving Fortitude saving throw when dealing with environmental conditions, it gains a +10.


This particular arachnid is a variation of the spewer arachnid. It has almost an identical appearance to the Spewer, and often is mistaken as such, although this particular arachnid is smaller and has a greyish tint to its exoskeleton. On average, the spewer is about 5 feet in height and is around 200 pounds in weight.

Unlike the other Spewer, this particular creature shoots acid instead of a plasma-like flame. It is immune to its own acid, although many other arachnids are not – and depending on the situation, the Acid Spewer may be willing to sacrifice other types in order to take out enemy targets.

These creatures are typically seeded among the larger groups of arachnids, acting as fire support. They will also work with the other Spewers, liberally mixing acid with the Plasma for an incredibly deadly combination.

If these creatures are killed in combat by piercing weapons, there is a chance that they might explode, spreading their acid over a short radius. This can be useful if they are mixed in with enemy troops, but it can be quite detrimental when they are still mixed in with other arachnids.

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.