Radiant Mirror Force

Exile all attacking creatures.
Foretell {p/w}{p/u}{p/b}{p/r}{p/g}(During your turn, you
may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell
cost.)
If you have 5 or less life, you gain 1 life for
each creature exiled this way.