The Arachnarok Spider and its howdah crew have their own characteristics, but are treated as a single model. If the Spider is removed as a casualty, then the Forest Goblin Crew are removed along with it.

When moving, the model always uses the Movement characteristic of the Spider. The Spider and the crew use their own Weapon Skill, Strength, Initiative and Attacks characteristics when they attack. Each can attack any opponent that the model is in base contact with. The crew use their own Ballistic Skill when making Shooting attacks.

All hits upon the Arachnarok Spider are resolved using the Spider's Toughness and Wounds. In combat, enemy models attacking the Arachnarok Spider use the Spider's Weapon Skill when rolling to hit. However, we assume the crew to be in complete control of the monster, so the Arachnarok Spider's Leadership is never used.

An Arachnarok Spider is treated as a monster in all other respects, as described in the Warhammer rulebook. It may be taken as a ridden monster for a Goblin Great Shaman, in which case any shooting attacks against the Arachnarok Spider will hit the monster on the D6 roll of 1-4, and the Great Shaman on a roll of 5+, as normal.