Venetatis

Venetatis
Venenatis is a large spider that resides east of the Bone Yard. She is able to drain prayer and perform a deadly special attack that can hit up to 51, however she will often use the special attack twice simultaneously which is capable of insta-killing all levels.

Unlike other bosses, Venenatis does not change aggression on her targets; once she locks onto a player the only way to get her aggression off them is by logging off, dying or getting far enough from her wander range.