Archbishop of Fealty

All creatures have "Pact - Sacrifice a land". (At the beginning of your upkeep, pay this permanent's pact cost. If you can't, sacrifice this permanent.)
Whenever an opponent sacrifices a creature, you may pay {w}{b}. If you do, return that creature to the battlefield under your control. It is a Zombie in addition to its other types, and it loses pact.
"Fail to keep up your end of the bargain and, well,
you did read the whole contract, didn't you?"