This rare, large spider, often referred to as a Shelob (Arachnae Robustus), generally weighs over 4 kg and has a body diameter of 38 cm. Its leg span is easily over a meter in diameter. The Rachnyn feeds primarily on small birds and rodents that get stuck in its web. These webs can be very complex and stretch 8 to 10 meters from the central core. The webs are coated with a toxin that is very similar to Neuro-Stun VIII. Whether Neuro-Stun VIII is derived from Rachnyn’s web toxin or if the Rachnyn is an escaped lab experiment involving Neuro-Stun VIII is still the subject of debate.