The Strongest Angel Evolutionary Tale

Story:

Lucifer, an angel who hates to lose and loves to fight, spends his days in countless battles. During a battle with the Demon King, he was unexpectedly betrayed by his comrades, and he was transported several hundred years later to the present day, where demons and humans coexist. Lucifer lost his former powers and everything else, but instead he gained the ability to evolve, copying the abilities of his defeated enemies. Lucifer realizes that the more enemies he defeats, the stronger he becomes, and faces powerful opponents.