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This patch will update any version of Diablo 3 to version 1.05. Patch Features
New System: Monster Power
Similar to the "Players X" command in Diablo II, Monster Power is a system designed to give players more control over how challenging enemies are in each difficulty. With this system, players can choose to increase the health and damage of monsters according to different "power levels" and in return they'll receive scaling bonuses to experience as well as boosts to Magic Find and Gold Find which will stack above the 300% cap. The option to increase Monster Power will be available to all players starting at level 1 in the Quest Selection window, and can be adjusted separately for Normal, Nightmare, Hell, and Inferno difficulties.
New Event: Infernal Machine
The Infernal Machine is a device that will allow level 60 players to battle "uber" versions of some of Sanctuarys most nefarious bosses. While the rewards for defeating these bosses will be great, some assembly is required. Only the most powerful Nephalem can unlock the secrets to building the Infernal Machine, but once forged the device can be used to open portals to special encounters featuring not one, but two bosses which have been augmented from their original versions, both in terms of difficulty and appearance. Defeating each boss pair will provide players with extra items and gold, as well as a chance to find components for a new Legendary ring.