

The first Keywarden is found anywhere in the Fields of Misery of Act I.

Video Guide to location of the Keywardens.Crafting the Hellfire Ring & Ring Stats.Uber Skeleton King & Maghda - The Realm of Discord.Uber Siegebreaker & Zoltun Kulle - The Realm of Turmoil.Uber Ghom & Rakanoth - The Realm of Chaos.Key of Evil - Silver Spire Level 1, Act IV.Key of Gluttony - Dahlgur Oasis, Act II.Click any topic to jump to that part of the guide. It is also a required step in crafting the Hellfire Ring. The Infernal Machine is a device that once crafted opens a portal to another realm where you can face off against Uber versions of Diablo 3 bosses.
