Tome of the Forsaken

{1}, {t}, Pay 1 life: Target card in your hand gains
Delve.
{1}, {t}, Pay 2 life: Put a creature card you own
from Exile into your hand.
{1}, {t}, Pay 3 life: Reveal cards from the top of
your library until reveal a creature with converted
mana cost 2 or less and put it into your hand.
Put the revealed cards into your graveyard.
If Tome of the Forsaken would leave the battlefield, you lose 10 life.