Simplify the following text for a Grade 6 native English-speaking person.
Original: Also called Sammael and Samil , he is considered in legend both a member of the heavenly host ( with often grim and destructive duties ) and a fallen angel , equatable with Satan and the chief of the evil spirits .
Simplified: Samael is often confused with Satan because he often has grim and destructive duties . He is often considered a fallen angel , like Satan and the chief of the evil spirits .