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Slay the Ubers in the realm, and cross your fingers for a Demonic Organ to drop along with the other loot.There are 4 types of Infernal Machines in Reaper of Souls, so players can open precisely the portal they wish.Players are advised to have 3 Infernal Machines to do all three in the same game. There is only one kind of Infernal Machine in D3, and the portal opened is random.Activate the Infernal Machine(s) to open a red portal to one of the Realms.Enter the Heretic's Abode in Act One Tristram town.Craft the keys (one of each required) to create an Infernal Machine.Reaper of Souls: Keys from Acts 1-4 in RoS, with one key from each Keywarden.Infernal Machine plan and/or a random key from the Act 4 keywarden. Diablo 3: Keys found from the Keywardens in Acts 1-3.See the sections below for full details about everything related to the Infernal Machine. Here's a quick summary of the steps in this event. See the Infernal Machine article for full details on the entire process.He is not found in Diablo 3, where only the other three Ubers/Portals are required to assemble Hellfire Ring materials. Uber Diablo is the newest of the Ubers, added to the Infernal Machine event in Reaper of Souls. Players find Uber Diablo in the Realm of Fright, and he must be slain in order to obtain the Heart of Evil. Uber Diablo is an Uber, one of the demons that must be slain during the Infernal Machine event, to obtain a Hellfire Ring or Hellfire Amulet.
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