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8112 Battle Arachnoid is an Exo-Force-themed set released in 2008. It includes 123 pieces and one minifigure: a Devastator.


The set consists of the Battle Arachnoid, a six-legged battle machine piloted by a single Devastator. Like many other Exo-Force sets released that year, it features a detachable brick-built mini-robot built into the model's design, which can snap off and be used independently. The cockpit of the Battle Arachnoid can detach to form a small flying craft, referred to as a Grav Runner.


The Battle Arachnoid was created as a replacement of the Shadow Crawler, as the latter was unable to travel through the dense - and living - forest by the Golden City.


  • Official images and the instructions' part list (booklet 2, page 14) suggest the skull is meant to go inside the mini-robot's green tank, but the instructions themselves (booklet 2, page 10) put the skull in the Grav Runner's tank instead.
  • Although officially part of the Exo-Force theme, this set is represented in 4850307 LEGO Battles by the Alien army from Mars Mission, which features the Builder, Laser Trooper, and Grav Runner derived from this set.
  • In 55000 LEGO Universe, the Spider Boss's legs are modeled after the Battle Arachnoid's legs. Description This is a description taken from Please do not modify it. (See an archive of the product’s page)

Striking with its armour-piercing fangs, this blast jet-powered new robot Battle Machine is a dangerous threat! Cockpit detaches to become an aerial attacker, and its weapon transforms into a mini-robot. This is a description taken from Please do not modify it. (See an archive of the product’s page)

Beware this spider's fangs!
Nowhere is safe in the Sentai Mountain jungle when the Battle Arachnoid is on the hunt! These robot battle machines strike with armor-piercing fangs, a transforming mini-robot weapon and a cockpit that detaches as an air attack vehicle.

  • Battle Arachnoid is over 6" (15cm) long and 7" (18cm) wide!
  • Includes robot pilot minifigure!

Minifigure Included


External Links