Final Blessing

As an additional cost to cast this spell, sacrifice an
angel.
Enchanted creature gets +3/+3, indestructible,
hexproof, and protection from non-white
creatures until the end of the game.
If a spell would cause you to sacrifice
enchanted creature, instead exile Final Blessing.
Enchanted creature gains ward {w}{w}{w}{w}
until the end of the game.