Keep finding new cards. Door To Nothingness causes opponent to lose the game. Costs 2 of every type of land. Also Fusion Elemental costs 1 of every type and is an 8/8. Channel the Suns gives you 1 of every type of mana.
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Or if you get the Bringers in and Soul of Theros, because it might mean you need 5 different creatures.
You should put Coalition Victory into this deck. Once you get Chromanticore out you win the game.