This elegant loop thrives on the interaction between Missy and Phyrexian Altar, transforming a humble creature into a permanent sacrifice engine. When you sacrifice Branchsnap Lorian to the Altar for mana, Missy immediately steps in to return it to the battlefield face down as a 2/2 Cyberman artifact creature. From there, you simply use that generated mana to pay for Branchsnap Lorian's own morph ability, turning it face up so it is ready to be sacrificed all over again.