|LEGO → System → Exo-Force|
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.
Now … Beware this spider's fangs!<br/>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!) wide!
- Includes robot pilot minifigure! +