The owner of this deck hasn't added a sideboard, they probably should...
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My buddy made a Demon deck, I started looking through some cards and it led to this.
T1:Goal is to play Swamp+Dark Ritual or Black Lotus to get out Necropotence, then Sac 19 life, draw 19 cards...odds are you will draw a Fastbond, Crucible of Worlds, Zurans Orb and a Black Lotus. Play them all and sac a land/keep bringing them back to have infinite life/lands to keep drawing cards and playing your whole deck.
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