Temur Lore-Catcher

{t}, Mill a card: Add {g} or {u}. (To mill a card,
put the top card of your library into your
graveyard.)
{3}{g}{u}, {t}: Return target creature card with
power 4 or greater from your graveyard to
your hand. Activate this ability only if there
are seven or more cards in your graveyard.