From Diablo Wiki
The Infernal Machine is an end game quest feature introduced into Diablo 3 in the v1.0.5 patch and changed in Patch 2.3. Prior to patch 2.3, the Keywardens would drop keys and the player would need one of each to craft one machine. Now, the Keywardens drop the machines directly. The Machines are used to open red portals to special dungeon areas where Ubers, super powered versions of certain quest bosses, must be defeated. These Ubers have a chance (increasing with difficulty level) to drop a Demonic Organ.
Once a player has collected all 4 demonic organs they can be crafted into a Hellfire Ring or a Hellfire Amulet by the Jeweler. Players without Reaper of Souls will only be make a version of the Hellfire Ring.
Infernal Machines only drop on the Torment difficulties.
- Diablo 2's end game event. is the obvious inspiration for this
In Reaper of Souls there are 4 different types of Infernal Machines, each of which produces a known Portal, making it possible to hunt each Demonic Organ specifically.
|Machine||Keywarden||Realm||Uber Bosses||Demonic Organ|
|Infernal Machine of Bones||Odeg the Keywarden in Act I||Realm of Discord||Leoric and Maghda||Leoric's Regret|
|Infernal Machine of Gluttony||Sokahr the Keywarden in Act II||Realm of Chaos||Rakanoth and Ghom||Vial of Putridness|
|Infernal Machine of War||Xah'Rith the Keywarden in Act III||Realm of Turmoil||Siegebreaker and Zoltan Kulle||Idol of Terror|
|Infernal Machine of Evil||Nekarat the Keywardenin Act IV||Realm of Fright||Uber Diablo + random Uber||Heart of Evil|
To use the machine, go to the Hermit's hut in New Tristram (its in the north).
- Torment I: 25%
- Torment II: 28%
- Torment III: 33%
- Torment IV: 38%
- Torment V: 43%
- Torment VI: 50%
- Torment VII: 60%
- Torment VIII: 70%
- Torment IX: 80%
- Torment X: 90% (Double machines are not uncommon.)
|Items of Diablo III  Item Basics Normal Items Crafting Legendary Armor I Legendary Armor II Legendary Weapons 1h Legendary Weapons 2h Item Sets|
|Item Basics||Item Affixes||Interface||Artisans||Miscellaneous |
• Prefixes & Suffixes
|Diablo 3 and Reaper of Souls Item Sets||Reaper of Souls only |
Crafted Item Sets
Crafted Item Sets
Themed Item Sets