This clever loop revolves around the cost-reduction power of Zirda, the Dawnwaker, which drops Nivix Guildmage’s spell-copying ability down to a much more manageable single blue-red mana. When you cast Unexpected Windfall, you set the stage by drawing cards and spinning off Treasure tokens to help fund the operation. You then point Nivix Guildmage's discounted copy ability at that very spell to manufacture an endless chain of copies, drawing your whole deck and generating massive value.