Lucifer Rosenda is the main antagonist in my novel The Last Immortals III-X. He use to be the Immortal Ruler but when Zerith killed his wife, he allowed his darkness inside of him to destroy nearly all of the kingdom. Because of this more than half of the Immortals died and Lucifer then outcasted himself and created his own kingdom and army called, Mortals. He uses these beings to destroy the worlds and universes and terrorize the other kingdoms; Immortal, Unknown and Oblivion.
Lucifer a childhood friends were Zerith and Zachariah but the three of them are now in a triangle of revenge.
Lucifer wants to kill Zerith but the real person he wishes most to kill is Genesis, the ruler/creator of darkness and the one who gave Lucifer his darkness, in order to put an end to all darkness. His overall wish is for everlasting peace and Zachariah is the one who helps him accomplish the goal of this and killing Genesis in the final book, End of Genesis.