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Mono blue/artifact legacy prison deck.
Get winter orb or rising waters out as fast as possible. That really puts a damper in any opponent's ability to do anything. From there, use mox opal, thran dynamo, and metalworker for extra mana. Icy manipulator can be used to lock down the last land that they would be able to use, and at instant speed. Voltaic key lets thran dynamo tap for 5. It can also be used to untap a creature after it attacks, since they're all artifacts. Kuldotha can go get blightsteel or emperion, depending on needs.Lodestone golem just makes it that much harder for your opponent to do anything.Cranial plating can obviously get pretty stupid pretty quick, especially considering even the lands are artifacts. If you're playing 1v1 and you can get an icy manipulator out after winter orb or rising waters, the game is pretty much over.
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