Doomsday
Weatherlight — rare
Sorcery
Doomsday rulings:
2018-03-16: If your graveyard and library combined contain five or more cards, you must choose five cards from among them. You can't choose to find fewer than that.
2018-03-16: If your graveyard and library combined contain fewer than five cards, all of those cards will wind up in your library.