Reveal Destiny

Look at the top half of your library, rounded up.
Choose a card and reveal it. You may play this
card. If you don't, put it into exile and gain 1/2
more your life total, rounded up.
Charge X—{6}: If you paid a Charge of {6} to cast
this spell, when it leaves play return it to play
under your control as a 3/3 Destiny creature that
is all colors and has "{t}, Choose a card you exiled
so far this game and put it into your hand."