Sarah, Loremaster

Whenever you cast a instant or sorcery card from
hand, put a page counter on Sarah, Lormaster.
{1}, {t}, Remove a page counter from Sarah,
Lormaster: Draw a card.
{2}{u/b}, {t}, Remove 3 page counters from Sarah,
Lormaster: Return target instant or sorcery card
from your graveyard to your hand.