Once you have all 3 keys, make and Infernal Machine. Act 1 - Field of Misery, Act 2 - Dahlgur Oasis, Act 3 - Stonefort.Ĥ. There is one in each of the first 3 Acts. Farm the other 3 Keywardens for the 3 keys needed to make the Infernal Machine. He is located in the Silver Spire Level 1.ģ. Kill the Keywarden in Act IV for the Infernal Machine plans. There is a Jeweler Design there as well that I don't think is needed as it is just for PC from what Ive read.Ģ. Hellfire ring of Strength), just the one that says Hellfire Ring and if you are on PS4 then just get the Blacksmith Plan. You do not need the ones that have specific stats in the title (ex. Buy the Blacksmith plans from Squirt in Act II. Im still learning some of this myself so I may be wrong, but I will try to help.