The owner of this deck hasn't added a sideboard, they probably should...
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Scion of the Ur-Dragon + the five stars of Kamigawa and Teneb, the Harvester. The idea is to get all your dragons out with the Scion, then kill them back off with stuff like spawning pit and damnation for their on-death effects, only to bring them back again. Then there are a bunch of cards thrown in there for fun.
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