Natasha, the Black Widow

+1: Put ghostform counter on 1 target nontoken creature. It has "When this creature dies or put into exile, return to owner's hand. Create 1/1 spirit
-3: Exile target nonland permanent.
-7: You get an emblem with "At the start of your upkeep, you may cast a legendary spell from your hand, graveyard or exile without paying its cost.