Cast Saw in Half by paying ({2} magic symbol) ({B} magic symbol) , destroying Scholar of the Ages and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
The two Scholar of the Ages tokens enter the battlefield, returning Sacrifice, if applicable, and Saw in Half from your graveyard to your hand.
Cast Sacrifice by paying ({B} magic symbol) and sacrificing a Scholar of the Ages token, adding seven ({B} magic symbol) .
Repeat.
You may also return up to two other instants and/or sorceries using the Scholar of the Ages tokens if they can be cast using black mana to get infinite casts of those instants and/or sorceries.
Results
Infinite black mana.
Infinite casts of instants and sorceries in your graveyard that can be cast using only black mana.