All keys, the crafting plan, the [[Demonic Organs]] and the [[Hellfire Ring]] are [[BoA]], which means they can not be traded for or even given away. Players must farm the ingredients themselves, though all players in a multiplayer game can use the portals to the various Uber battles.
* See the [[Infernal Machine]] article for full details.
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==Obtaining the Keys and Plan==
The Keywardens appear randomly-located in their special areas. Prior to v1.08 they could be found in all difficulty levels, but they now only appear on Inferno. To have a chance of a key dropping, a character '''''must''''' have 5 stacks of [[Nephalem Valor]] when the keywarden dies. (If a character does not have 5 stacks and sights the keywarden, the player needs merely leave him alive, get fully stacked, then return for the kill.)
The four keywardens and the planwarden are:
* The [[Key of Destruction]] may drop from [[Odeg the Keywarden]] in Act I - Fields of Misery, after Sword of the Stranger - Khazra Den
* The [[Key of Hate]] may drop from [[Sokahr the Keywarden]] in Act II - Dahlgur Oasis
* The [[Key of Terror]] may drop from [[Xah'Rith the Keywarden]] in Act III - Stonefort, after Turning the Tide
* The Blacksmithing Plan and random keys may drop from [[Nekarat the Keywarden]] in Act IV - Silver Spire Level 1
The first three keywardens can only drop their one key. For instance, Odeg will only drop the Key of Destruction; never a Key of Hate or Terror. Prior to v1.08 Nekarat could only drop the Plan and was thus useless to any player who already had it, but in that patch he was given the ability to drop any of the three other keys as well.
The only way to increase the chances of a key dropping is by playing on a higher [[Monster Power]].<ref>[http://blues.incgamers.com/Posts/10/1/40/819/188318/mf--infernal-machine-keys#postId_504786 Drop rate at MP0] - Blizzard CM, 17/10/12</ref> <ref>[http://blues.incgamers.com/Posts/10/1/40/819/188833/act-3-key-warden-drop-rate-unbalanced Innate drop rates equal] - Blizzard CM, 22/10/12</ref>
* Monster Power 0: 5%
* Monster Power 1: 10%
* Monster Power 2: 20%
* Monster Power 3: 30%
* Monster Power 4: 40%
* Monster Power 5: 50%
* Monster Power 6: 60%
* Monster Power 7: 70%
* Monster Power 8: 80%
* Monster Power 9: 90%
* Monster Power 10: 100%
[[Magic Find]] does not increase the chances of the keys dropping.<ref>[http://blues.incgamers.com/Posts/10/1/40/819/188318/mf--infernal-machine-keys#postId_504786 Magic Find effects] - Blizzard CM, 17/10/12</ref> though it does affect the other items the Keywardens drop, and these enemies can be an excellent source of Rares or Legendaries.
==Keywarden Visuals==
{| class="wikitable"
|-
! Key of Destruction
! Key of Hate
|-
| [[File:Odeg.jpg|400px]]
| [[File:Sokahr the keywarden.jpg|400px]]
|-
| Odeg in the [[Fields of Misery]], Act 1
| Sokahr in the [[Dahlgur Oasis]], Act 2
|}
{| class="wikitable"
|-
! Key of Terror
! Infernal Machine Plan
|-
| [[File:Xahrith.jpg|400px]]
| [[File:Nekarat.jpg|400px]]
|-
| Xah'Rith on the [[Stonefort]], Act 3
| Nekaret in [[Silver Spire]], level 1, Act 4
|}
The Keys and Plan are [[Bind on Account]] so they can not be traded for. A character may have more than 1 of each key at a time, but each key is consumed by the crafting process, so you will need multiple copies of each key to build the multiple Infernal Machines required to explore each portal area and gather all the materials required to craft the [[Hellfire Ring]].
==References==
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