Mnemosyne's Fleeting Memory

At the beginning of your precombat phase, you
may discard a card. If you do, choose one -
• Draw a card.
• Add {1}{r} to your mana pool.
Fervor {1}{r} (If you discard this card, discard it into
exile. When you do, cast it for its fervor cost or put it
into your graveyard.)