Vincet's Fortress

{w}{t}: Create an eagle token.
{u}{u}{t}: Draw a card.
{w/u}{w/u}{w/u}{t}: Create a castle guard creature token.
Whenever a white mana is spent to activate one of Vincet's Fortress gain 1 life.
Whenever a blue mana is spent to activate one of Vincet's Fortress untap Vincet's Fortress.