Mutated Spiders are a variety of spider that can be found in Watcher's Keep. Though they have few hit points in comparison to other spiders they are much faster and have a high number of attacks per turn. Like all spiders, they can poison their enemies and are immune to Web. Because of their speed it is best to kill them quickly. Spells such as Entangle, Grease, Slow and Hold Animal or Wands of Paralyzation may help to slow them down.