Helm of Foulness

The Helm of Foulness is a helm that provides several bonuses for players looking to train their Slayer skill. It is obtainable by killing 800 Aberrand spectres with a Mask of Stench, which can be won on Treasure Hunter. Unlike the mask, this does not provide double drops, extra damage or an XP boost, but does give access to an emote. The helm must be worn in order to perform the emote which can be accessed by right clicking the mask and selecting "Transform".