Venenatis is a large spider that resides east of the Bone Yard, and is the only enemy to drop the Treasonous ring. She is able to drain prayer points and perform a highly lethal special attack that can hit up to 50 damage, and may use the special attack twice simultaneously, which is capable of almost instantly killing players. She was a player-suggested boss, which was adopted into the game after a substantial amount of positive forum feedback.
The term Venenatis comes from the Latin "Venēnātis", which means "Venomous" or "Poisoned".
If Venenatis is attacked while she is in a single-way area, she will only take 1-6 damage from the player's attacks regardless of their weapon. This is because her habitat is in a single-way area, and all of the Wilderness bosses (excluding demi-bosses) reside in multi-way areas. Players can still deal full damage to her in the single-way area if she is lured into a multi-way area.