Who killed Graydon Creed?
Mystique. Or rather, he was killed by her future self (from not long before Dream’s End) inhabiting her past self’s body. When Prosh sent her back in time during the X-Men Forever series, she took over her own body and set up the murder weapon on a timer so that she was able to look innocent and have an alibi during Creed’s rally. She was taken into custody, Creed was killed by the remote gun, and she’d set up a message threatening her to further make herself look innocent. She’d also lied to Pyro, telling him they were planning to save Creed, presumably to give herself more of an alibi when he honestly told authorities he’d intended to save Creed’s life.
