Fever spiders being the strongest spiders to be found, offer a challenge to those who dare to attack them. They are poisonous and thus the adventurer needs to equip Slayer gloves or Slayer helmet to attack. These monsters are home to the Slayer dungeon high level, and can be found right near the entrance. Due to the high population of spiders, there are numerous amount of spiders to kill, offering slayers with free range of experience for their Slayer task.