The official GemStone IV encyclopedia.
Often first noticed as just a large clump of moving snow, the greater ice spider resolves into a wide, low-slung spider three feet across and half again as long. Covered with thick, white hair to ward against the cold wind, the greater ice spider roams the snowfields looking for anything living it can web and consume.
Watch out for the greater ice spider's webbing attack. This attack, if successful, will cause you to fall to the ground, possibly take damage, and be stunned for several rounds. In most cases this will be long enough for the spider to finish you off. Attack quickly and use mobility/agility/dexterity enhancing spells and devices when facing these creatures.
An example of a greater ice spider web attack.
A greater ice spider rises on its legs, tucking its abdomen beneath itself to aim its spinneret at you!
[SMR result: -176 (Open d100: -70)]
You dodge the webbing with such amazing finesse that you inspire all of those around you!