Birgi, God of Storytelling // Harnfel, Horn of Bounty

Oracle Text

[Birgi, God of Storytelling]
Whenever you cast a spell, add {R}. Until end of turn, you don't lose this mana as steps and phases end.
Creatures you control can boast twice during each of your turns rather than once.

[Harnfel, Horn of Bounty]
Discard a card: Exile the top two cards of your library. You may play those cards this turn.