The evil Thorgrim (Thulsa Doom's musclebound henchman in CtB) uses a gigiantic hammer. Looking in Bastion Press's 3.0 D&D Arms & Armor, I find this to be a suitable stand-in, to which I've added Conan tweaks:
War Maul (Large Exotic Melee): The war maul is a five foot warhammer that is too heavy to use for an untrained Medium creature, even with two hands. In fact, a creature must have a minimum Strength score of 17 to even wield one effectively at all. A Medium creature with the Exotic Weapon Proficiency and Strength 17+ can wield the war maul with two hands. A Large creature can use a war maul with two hands as a martial weapon, or with one hand as an exotic weapon. A Large creature without the Exotic Weapon Proficiency who uses the war maul in one hand suffers the standard -4 penalty to its attack rolls.
War Maul: 100 sp, 2d8/x3, AP 7, 30 lb., Hardness 8, Hit Points 10, Bludgeoning, Reach: 5 ft.
Looking for feedback to fine-tune this weapon.
War Maul (Large Exotic Melee): The war maul is a five foot warhammer that is too heavy to use for an untrained Medium creature, even with two hands. In fact, a creature must have a minimum Strength score of 17 to even wield one effectively at all. A Medium creature with the Exotic Weapon Proficiency and Strength 17+ can wield the war maul with two hands. A Large creature can use a war maul with two hands as a martial weapon, or with one hand as an exotic weapon. A Large creature without the Exotic Weapon Proficiency who uses the war maul in one hand suffers the standard -4 penalty to its attack rolls.
War Maul: 100 sp, 2d8/x3, AP 7, 30 lb., Hardness 8, Hit Points 10, Bludgeoning, Reach: 5 ft.
Looking for feedback to fine-tune this weapon.