Engorge (As this enters, mill three cards, then exile a card from among the milled cards.) When Scourge of the Deadlands enters, if it engorged a creature card, each other player sacrifices a creature.
Scourge of the Deadlands is legal in every format.
Rulings
2018-09-03
Scourge of the Deadlands's ability checks if the card engorged by it is a creature card when it triggers and when it resolves. If the card is no longer in exile at either point, the ability will have no effect.