Priestess of Harvest

At the beginning of your upkeep, you may pay {2} and sacrifice a food token, if you do,
scry 1 and exile the top card of your library-then create an 0/1 colorless Egg creature token that
reads "Exile a creature from your hand-
when this creature leaves play you may
play exiled creature without paying its mana cost.
—
Trick or Treat?