These spiders are found first in the Abandoned floors. Note that although it exists on Free-to-play worlds, it does not inflict poison to Free players. This spider is particularly taxing on floors which are on complexity one, as it is extremely hard to cure poisons on those floors aside from eating food to offset the damage. Also, players cannot rest whilst poisoned, which can pose an additional challenge to those doing complexity one floors, although these floors are generally very short and don't require much running. They do not count as spiders for Slayer assignments.