Combo Freed from the Real +Apprentice Wizard +Chromatic Orrery
With Chromatic Orrery in play: -Enchant Apprentice Wizard with Freed from the Reel. -Pay a blue to tap Apprentice Wizard to get 3 blue mana from Chromatic Orrery. -Use one of those blue to untap Apprentice Wizard with Freed From the Real, leaving you with 2 mana. -Use one more of that blue mana to tap the Apprentice Wizard leaving you with one extra mana. -Rinse and repeat for infinite blue mana or mana of any color.