The Hell Forge Hammer is an infernal tool held by the vile smith, Hephasto the Armorer. It has the power to dent even the hardest metals and shatter the legendary Soulstones. It is a quest item used in the Hell's Forge quest, where the player must destroy Mephisto's Soulstone on the Hellforge. The quest item can also be used as a weapon. It's not very useful compared to the damage of other melee weapons by the time most characters are up to Act IV, but because it has no requirements, it's a popular weapon for people to give to their brand new level 1 characters.