This engine transforms the raw card-drawing power of Unexpected Windfall into a self-sustaining loop by heavily discounting the copy mechanics of Nivix Guildmage. Normally, copying an instant or sorcery with the Guildmage is a steep investment, but Training Grounds steps in to reduce that activation cost down to just {U}{R}, making the math work out in your favor. Each copied windfall generates two Treasure tokens that you can immediately crack for the exact mana needed to fuel the next copy of Unexpected Windfall. The result is a brilliant feedback loop that keeps your hand constantly refreshed while churning through your entire deck.