A blessed spider is a type of spider found only in the Underground Pass. They are found on the west side of the bridge and in the pit where Kalrag is located. They are believed to be blessed or "converted" to Iban. Like most spiders, blessed spiders attack with melee and are weak to crush.

Blessed spiders are initially not aggressive to players with a combat level of 78 or above. However, if Kalrag is killed, they become aggressive to all levels of players, and are able to attack the player simultaneously as though if they were in a multicombat area. When Kalrag respawns, they revert to being non-aggressive, except for any that might be attempting to attack the player already.

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