MTG >Combos >Tortured Existence +Doubling Season +Bartered Cow +Academy Manufactor +

With all cards in play and Bartered Cow in your hand: Pay one mana and discard Bartered Cow with Tortured Existence to return any creature from your graveyard to your hand Bartered Crow's ability will trigger, create a Food token Academy Manufactor's ability will trigger, creating a Clue token and a Treasure token Doubling Season's ability wil make you create two tokens of each. Sacrifice the Treasure token to add one black mana, and discard a creature from your hand to return Bartered Cow from your graveyard with Tortured Existence Repeat the process for infinite tokens.