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.
Stats
Hell Forge Hammer
One-Hand Damage: 6 to 15
Durability: 55 of 55
Mace Class - Fast Attack Speed
Adds 5-20 fire damage
+35 Defense
Fire Resist +40%
+50% Damage to Undead
Name Origin
The Hellforge Hammer.
The Hellforge Hammer is the mythical Hammer that forged the Demonic Runeblade, Shadowfang. It has powers rivaling those of the Horadric Malus itself. Its name is taken from Hell's Forge itself, the Hellforge.
The Hellforge Hammer is referenced in Diablo I during the initiating dialog of the Anvil of Fury quest. But Griswold's description seems to exaggerate the Hellforge Hammer's abilities. But that can be due to the fact that the Hammer ultimately requires a skilled blacksmith, and that too demonic in nature, to wield to its fullest effect. The player does not meet both of this criteria, It might also be that to Griswold it was only a legend that had been exggerated over time.
The hammer has characteristics related to Hell, such as Fire Resist and Fire Damage.
Other versions
Possibly due to bugs, it may also possible to make it better by imbuing it or socketing it with a rune word.
Normal Maces — • Felloak (Club) • Stoutnail (Spiked Club) • Crushflange (Mace) • Bloodrise (Morning Star) • The General's Tan Do Li Ga (Flail) • Ironstone (War Hammer) • Bonesnap (Maul) • Steeldriver (Great Maul)
Exceptional Maces — Dark Clan Crusher (Cudgel) • Fleshrender (Barbed Club) • Sureshrill Frost (Flanged Mace) • Moonfall (Jagged Star) • Baezil's Vortex (Knout) • Earthshaker (Battle Hammer) • Bloodtree Stump (War Club) • The Gavel of Pain (Martel de Fer)
Elite Maces — Nord's Tenderizer (Truncheon) • Demon Limb (Tyrant Club) • Baranar's Star (Devil Star) • Horizon's Tornado (Scourge) • Stormlash (Scourge) • Stone Crusher (Legendary Mallet) • Schaefer's Hammer (Legendary Mallet) • Windhammer (Ogre Maul) • Earth Shifter (Thunder Maul) • The Cranium Basher (Thunder Maul)
Quest Items — Horadric Malus • Khalim's Flail • Khalim's Will • Hell Forge Hammer