Pride Gl

Pride Gl
10 points if you solve this?

The following riddle is pretty difuculte and im finding 2 words:

Im your evil side
i boast all my pride
you can say im your shadow
Or you can say im another soul
when your in this state
your evil rate
is so high
that you even lie
What Am I?
im not acutally looking for a person thing well sort of but 2 words spaced out
first one who answers gets 10 points 😀 gl

Alter ego.

Pride(Live) -Chage&Aska