In Supernatural Season 11 episode 8 when
Sam is back in the cage with Lucifer,
why is the latter still evil?
We have seen earlier that the reason for his evilness
is may be
that he was the first bearer of the Mark of Cain (the result of God betraying the Darkness) and the Mark is supposed to corrupt the bearer.
But since the
has been destroyed and Dean is back to normal, why doesn't the same happen to
Lucifer. Why is he still evil?