Cura Ultima

Spell Stack {2}{w} (You may cast this spell as a
sorcery for {2}{w}. If you do, place it face down on
the battlefield as a 2/2 creature with; When you
cast another non-creature spell, you may flip this
spell over and cast it for its spell stack cost.)
You gain 5 life. If this spell was stacked, you gain an additional 5 life for each stacked
spell you cast at the same time as this spell.