Ojutai's Seeker

When Ojutai's Seeker enters the battlefield, you
may a draw a card. If you do, discard a card.
Discard a card: Target instant or sorcery card in
your graveyard gains flashback until end of turn.
The flashback cost is equal to its mana cost.
{t}: Exile target card from your graveyard. Add {u}{r}{w} to your mana pool.