Board Thread:Legitimate Canon Questions/@comment-25178327-20140116033806/@comment-5322646-20140116210423

^ Cora needed to live. It signified the change in Derek that he needed. If he gave up his spark and she still died then he would have went even further down the wrong path. People say the Death of Boyd and Erica were also pointless (even though they were never avenged), but they were crucial to Derek's character growth and development. Since Cora did live Derek had a return on his investment. When he saved her, had the moment with Boyd, and carried Erica sparked the change he needed to get him back to a way of thinking he hasn't had since he was 15. Those events culminated in him saving the day in 3b by not only fighting Jenn during the Eclipse, but also convincing Jenn to heal Deuc which he knew woudl weaken her.