Venenatis is a large poison 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.
On release, the tree stump found south-east of the trees in 24 Wilderness was one square south than what it is now. This was changed in an update in order to prevent players safespotting Venenatis behind the trees. However, it can still be done, albeit with a lot more effort.