This clever setup bypasses the steep sacrifice requirement of Lotus Vale entirely by treating it as an incredible mana engine, tapping it for three mana of any color. To sustain the loop, Vizier of Tumbling Sands uses its tap ability to untap the land, while Freed from the Real enchants the Vizier, allowing you to untap it repeatedly for just one blue mana. Because Lotus Vale generates three mana for every two spent on the Vizier's untap cost, you are left with a net positive yield of mana, resulting in infinite colored mana of any desired type.