Why death and hell casts into the lake of fire? Have you read and understood it? If you have accepted Jesus Christ as your personal savior and follows His teachings,you would no longer be a slaves to death and hell.
Yes, you might said, 'I am not afraid of death'. So do those that are redeemed by the blood of Jesus. If you are reading this now but have not given your life to Jesus, the opportunity is right now. Revelations 20:14, ' And death and hell were cast into the lake of fire. This is the second death.' If your name is not written in the Book of Life, thus shall also be cast into the lake of fire.
He who has an ear, let him hear what the Spirit says to the churches. The one who is victorious will not be harmed by the second death.