Starfinder: Evolved Tank Arachnid

Chris Van Deelen

Evolved Tank Arachnid Combatant CR 18 XP 153,600

Neutral Gargantuan vermin

Init +0; Senses: Darkvision 60 ft.; Perception +31


Defense                                                             HP 375

EAC: 32; KAC: 38

Fort: +21; Ref: +19; Will: +16

Defensive Abilities: DR 18 / -, hardened survivor; Immunities: Poison, radiation



Speed: 30 ft., burrow 30 ft.

Melee: 2 claws +28 (13d6+33 P), or bite +32 (13d4+33 P Crit swallow whole)

Space: 20 ft., Reach: 20 ft.

Offensive Abilities: Stream of fire, swallow whole, trample (13d8+33 B Crit knockdown)



Str +19; Dex +0; Con +6; Int -; Wis +0; Cha +0

Skills: Athletics +31, survival +36

Languages: None



Environment: Any

Organization: Solitary, pairs, or small groups (1d4+2)


Special Abilities

Hardened Survivor (Ex): The evolved tank arachnid 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.

Stream of Fire (Ex): The creature, as a full round action, can spray a stream of napalm-like chemical fire. The stream is 10 feet wide and can reach out to a maximum of 150 feet. Anyone caught in the stream area of effect is allowed a Ref save (DC 23) or take 8d12+18 flame damage. A successful save cuts the damage in half.  To make matters worse, the flame will continue to burn for 1d3+1 rounds, unless the victim is able to somehow smother the flames (rolling in dirt, dousing in chemical fire-extinguishing foam, jumping into a river or large body of water). Also the napalm-like fire will remain on whatever terrain it coated when the arachnid used this ability and will last for 1d3+1 rounds before burning out. The Evolved Tank is able to use this ability once every second round.

Swallow whole (Ex): The creature is able to potentially swallow whole any creature it bites which is at least one category size smaller. See page 156-157 of the Alien Archive for more information.

Trample (Ex): As a full-round action, the creature can move up to twice its speed and literally run over any opponents at least one size category smaller than itself. The Evolved Tank merely has to move over the opponents in its path. The creature does not need to make an attack roll; each creature whose space it moves through takes damage. A target of a trample can make a REF save (DC 23) for half damage. If it attempts the save, it can’t make an attack of opportunity against the trampling Tank due to the creature’s movement. The Evolved Tank can deal trample damage to a given target only once per round.


The arachnids found the original tank to be an excellent combatant, but due to its size and vulnerability to explosives, it tended to be a fire-magnet. A relatively knew arachnid has been recently discovered on the battlefield. It is significantly larger and has all the traits that the tanks were known for, but lacks the main weakness of the original.

This version of the Tank is larger, approximately 25 feet in length, and 15 feet in width, and 15 feet in height. They are massively heavy and weigh in excess of 45,000 pounds. The body of the creature is covered in even heavier armor, giving it excellent protection against most types of physical attacks, although it is still vulnerable to energy-based attacks. The body of the creature also has larger spikes, and despite the bulk and weight, it is faster than the original design.

When it engages in combat, the evolved tank is able to use its napalm-like fire more rapidly, although it is not shy when it comes to getting up close and personal in combat. It seems to enjoy using its claws and relishes in biting close-in targets, often swallowing them whole so they can enjoy a nice snack in the middle of a deadly fire-fight.

Arachnid overseers, thinkers and other leader-types often use these creatures together with the original tanks, but tend to send them after fortified installations or enemy armor, as they can often go toe-to-toe and come out on top.

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, and the recently released 'Swords of Kos: The Rite'. 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.