Reign of Azorius

All enchantments in your hand gain Forecast - {w}{u}, Reveal this card from your hand: Put a 1/1 white and blue Knight creature token with haste into play. Sacrifice it during your next upkeep. (Play this ability only during your upkeep and only once each turn.)

You may cast cards that have both white and blue mana in their mana costs for {3} less.