Name of Legend

This is a magical story, where magic and magical wishes coexist. The demonic wish "Suffocation" made by the princess of a perishing kingdom before her death turned the territory of a perishing kingdom into a cursed place. This cursed land is isolated from the magical world and surrounded by cursed deserts. The entire cursed land is banned from demons because of the Demon Wish domain. Only another Demon Wish can leave the cursed land safely and go to the magical world. The destiny that is doomed needs to be changed at the minimum cost. The light civilization that destroyed its home and wandered around the universe sent countless advance teams, and this special giant life planet received an uninvited advance team. They caused the kingdom's demise, where the story begins. How did the protagonist transform from a confused devil to a righteous devil and finally to a righteous angel? Live up to the name of the legend