Come to an End

For each player, you choose a creature and a
planeswalker that player controls. Then, each
player sacrifices each other creature and
planeswalker he or she controls.
At the beginning of your next upkeep, you may
pay {x}{x}{w}. If you do, exile X target creature
cards from any players' graveyards and create
tokens that are copies of them, except they're
1/1 white Spirits in addition to their other types.