The Infernal Machine is an [[end game]] quest feature introduced in the [[v1.0.5 patch]]. The feature was teased pre-patch in several developer blogs<ref>[http://diablo.incgamers.com/blog/comments/diablo-3-patch-1-0-5-sneak-peekPatch 1.0.5 Sneak Peak] - Blizzard CM, 13/09/12</ref> and interviews<ref name=ign>[http://uk.ign.com/articles/2012/09/17/diablo-iii-patch-105-the-two-biggest-features-detailedInterview]- IGN, 17/09/12</ref> <ref name=gnn>[http://diablo.incgamers.com/blog/comments/more-new-details-on-v1-0-5Interview]- Gnn.Gamer.com.tw, 18/09/12</ref>, which gave only vague details and hints about the content and creation of the feature. 

The first word of the Infernal Machine came in a Patch 1.0.5 Sneak Peek developer blog post on September 13, 2012<ref name=blog>[http://us.battle.net/d3/en/blog/7155880/Patch_105_Sneak_Peek-9_13_2012Blog Update]- Blizzard, 13/09/12</ref>. The brief quote is below:

* To unlock ==Find the Infernal Machine players will have to gather ingredients from all four acts by killing the Key Wardens. (Apparently even longer Keys and more involved than Diablo 2′s Pandemonium Event.)Plan==

Once To unlock the Infernal Machine players have to gather keys and a plan are acquired from all four acts by killing the machine needs to be assembledKey Wardens. (An even longer and more involved process than Diablo 2′s {{iw|Pandemonium_Event Pandemonium Event}}.)

* You now The Key Wardens always appear in an [[Inferno]] game but it is not guaranteed they will drop what you need to head to the Heretic's Abode in Tristram to the north west of the town by Brother Malachi he Healer.

The three realms that However, you '''can''' guarantee a drop by utilising [[Monster Power]]. Each monster power level gives a 10% drop rate, therefore Monster Power 10 will give you a drop rate of 100%. Finally, you need to have five stacks of [[Nephalem Valor]] in order for the machine will open portals keys or plan to include:drop.

* Discord - [[King Leoric]] and [[Maghda]]* Chaos - [httpThe drops required to assemble the machine are found in://diablonut.incgamers.com/npc/87642-ghom Ghom] and [http://diablonut.incgamers.com/npc/4630-rakanoth Rakanoth]* Turmoil - [http://diablonut.incgamers.com/npc/96192-siegebreaker-assault-beast Siege Breaker] and [http://diablonut.incgamers.com/npc/80509-zoltun-kulle Zoltun Kulle]

The machine will only work once and open one portal{| class="wikitable"|-! Key of Destruction! Key of Hate! Key of Terror! Infernal Machine Plan|-| [[File:Odeg. To open another portal you need to reconstruct jpg|300px]]| [[File:Sokahr the machine againkeywarden.jpg|300px]]| [[File:Xahrith.jpg|300px]]| [[File:Nekarat.jpg|300px]]|-| [[Fields of Misery]], Act 1| [[Dahlgur Oasis]], Act 2| [[Stonefort]], Act 3| [[Silver Spire]], level 1, Act 4|}

* The Infernal Machine level has “a completely new architecture” (tileset?), but no new bosses or monstersKeys and Plan are Bind to Account so you can not trade for them. You can have more than 1 of each key at a time.

* The ==Build the Infernal Machine reward is a new == [[File:Icon portal device.png|left]][[File:Heretics abode door.jpg|thumb|100px|Doorway to Hell]] Once you have the three keys and the infernal machine plan visit the [[Blacksmith]]. He needs to be level 10 to craft the machine for you. He will charge you 12,000 gold. He will craft the portal device for you, which will sit in your backpack until you use it. To use the device you need to go to the Act 1 quest [[LegendaryReturn to New Tristram]] ring (Hellfire Ring[http://diablonut.incgamers.com/quest/return-to-new-tristram db]) only available from this questand locate [[Brother Malachi the Healer]] in the north east of Tristram. The biggest news is that house behind him has a boarded up door, smash it down and enter the [[Heretic's Abode]]. Right click the device in your backpack and a red portal will spawn. This will lead to one of three realms where you will face two bosses you have fought before.  :* Realm of Discord - [[King Leoric]] and [Bind on Account[Maghda]]:* Realm of Chaos - [[Ghom]] and [[Rakanoth]]:* Realm of Turmoil - [[Siegebreaker_Assault_Beast|Siege Breaker]] and [[Zoltun Kulle]]  The machine will only work once and open one portal. To open another portal you need to reconstruct the machine again, by collecting the three keys, visiting the Blacksmith and paying him 12,000 gold to craft you another Infernal Machine device. So no trading   ==Rewards== The Bosses will drop loot but they also have a chance of dropping components needed to craft a special ring, The Hellfire Ring. The components are:  :* Writhing Spine drops from [[King Leoric]] or [[Maghda]]:* Devil's Fang drops from [[Ghom]] or selling [[Rakanoth]]:* Vengeful Eye from [[Siegebreaker_Assault_Beast|Siege Breaker]] or gifting[[Zoltun Kulle]]  As with the keys from the Wardens you need to have 5 stacks of [[Nephalem Valor]] and each level of [[Monster Power]] will give you a 10% chance to drop the item, but so MP10 gives you a 100% chance to drop.  ==The Hellfire Ring== [[File:Icon hellfire ring.jpg|left]]You can use buy the Hellfire Ring plan from [[Squirt the Peddler]] in Act 2 for 2 million gold. Take the plan to your [[Jeweler]] who needs to be level 10 and he will learn it . Once learned he will need all three of the above components and 50,000 gold to craft. {{Clear|left}}He can craft one of four varieties of the ring where one of the affixes will focus on Strength, Dexterity, Intelligence or Vitality. The stats are as follows: : Increase Bonus experience by 35%: Chance to launch an explosive ball of Hellfire when you attack (the proc on this has been greatly reduced since the PTR launched): 4 random properties: 170-200 Intelligence, Strength, Dexterity or 100 Vitality (you choose with other characters one)  * The ring is account bound and therefore can not be sold or traded.* You can only wear one Hellfire Ring, your Followers can wear one also.* There is no level requirement on the ring so any of your accountcharacters can wear it.  ==Gallery== <gallery>File:Infernal machine plan.jpg|Crafting the DeviceFile:Infernal machine device.jpg|Device in backpackFile:Heretics abode.jpg|[[Heretic's Abode]]File:Infernal machine portal.jpg|PortalFile:Hellfire ring plan.jpg|Hellfire Ring OptionsFile:Hellfire ring strength.jpg|Hellfire Ring (Strength)</gallery>