The Tzhaar-ket-om, also known as the obsidian maul, requires a Strength level of 60 to wield. It is a two-handed weapon. It is affected by the Berserker necklace, receiving a 20% damage increase when the necklace is worn. It is also affected by the Obsidian armour (helmet, platebody and platelegs) which will increase the melee attack and melee strength by 10%. The damage bonus does stack with the Berserker necklace.
Two of these are used to build an obsidian fence at level 83 Construction in a player’s Superior Garden.
The maul is used commonly in player-killing because the only requirement is a Strength level of 60, which makes it possible to have a low Combat level while being able to deal high amounts of damage. However, one major drawback of this weapon is its poor attack speed.
The maximum hit in a standard PvP fight with the maul is 63. This can be done by wearing an Obsidian helmet, platebody, platelegs, Berserker necklace, Berserker ring (i), Infernal cape, Barrows gloves, Primordial/Dragon boots and using a Super combat potion while having Piety active.