As the X-Men search the rubble, they find former X-Men villain and teacher Emma Frost as one of the survivors, having survived the Sentinel onslaught thanks to her body undergoing a new secondary mutation. At the X-Mansion, Beast investigates the biological origins of the powerful enemy they have just captured, while also revealing the possibility of mankind's genetic extinction within the next few generations. When Cassandra suddenly overcomes her imprisonment and effortlessly makes her way to Cerebra (in order to take over Charles Xavier's mind), Emma Frost (who moments before the battle began had left the X-Mansion, intent on revenge against humans for the genocidal Sentinel attack on Genosha) shows up again to snap Cassandra's neck. But Emma arrives too late, as Cassandra has swapped bodies with Xavier and shoots him (now in Cassandra's body) to keep Xavier from revealing what has just happened.