Most of Protestant and Catholic theology is immersed in pagan concepts of hell, reinforced by Dante's Inferno. Here is what the Bible says, without tradition.
Oblivion, not eternal torment in hell fire, is the merciful end for the wicked. God is both good and severe, but His mercy endures forever.
The origins of our adversary, Satan the Devil, and his host of fallen angels or demons. God has promised us protection if we yield to and obey Him.
Christ's Two Witnesses will accomplished their work before the Beast kills them. Humanity will feel relief at their death, but stark terror at their resurrection.
Satan refuses to repent, even after suffering 1,000 years of confinement. Upon his release, Satan expertly manipulates the pulls of carnal nature.