Cast Burnt Offering by paying ({B} magic symbol) and sacrificing Scholar of the Ages, adding seven mana in any combination of ({B} magic symbol) and/or ({R} magic symbol) .
Cast Makeshift Mannequin by paying ({3} magic symbol) ({B} magic symbol) , returning Scholar of the Ages from your graveyard to the battlefield.
Scholar of the Ages triggers, returning Burnt Offering and Makeshift Mannequin from your graveyard to your hand.