The void knight mace can be bought from a Void Knight for 250 commendation points, although a player must have 42 Attack, Strength, Defence, Hitpoints, Ranged, and Magic, along with 22 Prayer. The mace can also be used to autocast the Claws of Guthix, Crumble Undead, wave and surge spells. To cast Claws of Guthix, the player still must have cast the spell 100 times in the Wilderness Mage Arena.
Note that the Void knight mace does not count towards the four pieces needed for the void set effect.
Its stats are relatively close to the rune mace's stats, with the main difference being a 25% slower attack speed relative to the rune mace. It also has +2 bonus in Stab, Slash, and Crush attack, as well as Stab, Slash, Crush, Magic, and Ranged defence, as well as a relative +2 Strength and Prayer bonus compared to the rune mace. Due to its role as one of the weapons to cast Claws of Guthix, it also has a +8 Magic attack bonus. These stats make it one of the only melee weapons in game to have a positive ranged defence bonus, other than the red topaz machete and lunar staff, with +1, and the dragon spear and Zamorakian spear, with +5 and +13, respectively. Unlike other maces, however, it only has crushing attack styles. Alongside croziers and the 3rd age druidic staff, it has the highest Prayer bonus of all one-handed weapons.
A player can still cast or autocast Claws of Guthix with a Imbued Saradomin Cape or Imbued Zamorak Cape.