The Book of Exalted Deeds (AFR-4)

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.