Uncanny X-Men (2011) #13
What has Mr. Sinister been doing since his last run-in with the X-Men? And what has he been doing while the X-Men have been fighting the Avengers? Find out here!
What has Mr. Sinister been doing since his last run-in with the X-Men? And what has he been doing while the X-Men have been fighting the Avengers? Find out here!
