Upon playing Treasure Hunter for the first time, players are given the mask for free and this message: You've received a Troll Slayer Mask! You can win additional slayer masks for different creatures on Treasure Hunter! It provides several bonuses for players looking to train their Slayer skill, including bonus experience, extra damage, and double drops. Players must wear the mask in order to get the kills counted. After killing 100 Trolls, the mask will become a Helm of the Troll. The helm has similar benefits, but does not provide bonus experience, extra damage, or double drops.