Overkeyed Doctor

When Overkeyed Doctor enters the battlefield,
you may return target instant or sorcery with converted mana cost 3 or less from
your graveyard to your hand.
{2}{b}{g}, Sacrifice Overkeyed Doctor: Return
target instant or sorcery with converted mana
cost 4 or greater from your graveyard to your
hand.
He's a key worker, he picks locks.