Originally Posted by merbass
How about an older Mystique going back in time to kill her younger self ?
Impossible. The 'grandfather paradox' of time travel theoretical science means you cannot kill someone who would prevent you existing (and therefore prevent you from being able to be alive to travel back in the first place).
Batman v Superman 6/10, Captain America: Civil War 7.5/10, Deadpool 8/10, X-Men: Apocalypse 8/10, X-Men: Days of Future Past 9/10