The Book of Exalted Deeds

At the beginning of your end step, if you
gained 3 or more life this turn, create a 3/3
white Angel creature token with flying.

{w}{w}{w}, {t}, Exile The Book of Exalted Deeds:
Put an enlightened counter on target Angel. It
gains “You can’t lose the game and your
opponents can’t win the game.” Activate only
as a sorcery.