Hellforge

The Hellforge is a crafting station that incorporates the same functions as a regular Furnace, additionally being able to smelt Hellstone into Hellstone Bars. It is also used to craft the essential Adamantite/Titanium Forge in Hardmode.

Hellforges cannot be crafted, and are found in Ruined Houses in the Underworld. On the, Hellforges can only be collected with a Deathbringer or Nightmare Pickaxe or better (60% pickaxe power). Once placed at higher depths, they can be removed with any pickaxe.

Used to craft
The Hellforge also functions as a Furnace.

Tips

 * With a bit of luck, a Teleportation Potion may take the player to the Underworld, making the Hellforge easily obtainable early-game.
 * If the player brings a bucket of water down to the Underworld, then they can obtain a Hellforge before obtaining the Deathbringer or Nightmare Pickaxe. Simply kill a Lava Slime near the Hellforge (placing a block or two to keep the resulting lava from flowing away might be useful), then dump the bucket of water onto the lava-submerged Hellforge. The resulting Obsidian Blocks will displace it, allowing the player to collect it.

Trivia

 * It appears to be made of Hellstone Bricks.
 * Even though the Hellforge looks like a Furnace and acts like one, it cannot be crafted from it.
 * Although it is a late pre-Hardmode version of the Furnace, it is not required to smelt Cobalt, Palladium, Mythril, and Orichalcum into bars.
 * Prior to 1.2, the Hellforge and Furnace looked like rounded forges.