'''Keywardens''' are unique [[bosses ]] who hold have a chance to drop the keys needed and plan required to create activate the [[Infernal Machine]] and obtain a [[Hellfire Ring]]. There Keywardens are threeonly found on Inferno difficulty, and each one is randomly located in a given level, one per act.  To have a chance at one of the keys or the plan dropping, players need to kill the first three acts. Players must play in Keywardens with 5 stacks of [[InfernoNephalem Valor]] . Higher levels of Monster Power increase the odds of a key dropping. Keywardens drop items like other Elite bosses, and can be a good source of legendaries and rares, but their special ability to drop keys is what makes them prized enemies.  ==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 five 5 stacks of [[Nephalem Valor]] active 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* 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* 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 v1.07 Nekarat could only dropthe Plan and was thus useless to any player who already hd it, but in that patch he was given the ability to drop any of the three other keys as well. To guarantee  The only way to increase the chances of a dropped key dropping is by playing on a higher [[Monster Power]] should .<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 set 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 to Account so you can not trade for them. You can 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 10explore each portal area and gather all the materials required to craft the [[Hellfire Ring]].