Necromancy on the battlefield or in your graveyard (attached to
Scholar of the Ages).
Burnt Offering and
Corpse Churn in hand.
The Master of Keys and
Scholar of the Ages on the battlefield.
Mana Needed
({B} magic symbol) available.
Steps
Cast
Burnt Offering by paying ({B} magic symbol) and sacrificing
Scholar of the Ages, adding seven ({B} magic symbol) .
Cast
Corpse Churn by paying ({1} magic symbol) ({B} magic symbol) , causing you to mill three cards.
Cast
Necromancy from your graveyard for its escape cost by paying ({2} magic symbol) ({B} magic symbol) and exiling three cards not used in the combo, returning
Scholar of the Ages from your graveyard to the battlefield and attaching