Barry Windsor Smith cover. “E is for Extinction” rocks on ? with Sentinels in the skies! With racial paranoia at an all-time high, the villain known only as Cassandra unleashes a legion of transfigured Sentinels on the world’s mutant population! Their first target? The island nation of Genosha! Caught in the maelstrom are Cyclops and Wolverine and one of them will have to make a terrible choice!