In this video guide I will show you how to gather all the ingots in the Inferno Vault and take them to Hell's Forge. This will be the third level in the game. What you are looking for is orange bricks on the ground. They are pretty easy to find for the most part. The first three are on the first floor, and the last one is on the second flood. Which is inside the dungeon. Watch the video for better location detail.
Once you collect all four you will need to head to Hell's Forge, which is located behind the trickster door. Which is on the top floor, top left of the map. You will need some trickster keys to open it. You can either buy some from Vulgrim, or collect the ones on the map. Once you head inside the door, head all the way down the hall. You will see a weird tower object and the button prompt to press the B button. Once you hit B, there will be some dialog and the achievement will pop.