Sent to Die on Floating Island, But I Absorbed All Skeletons and Earned My Own Domain

What the story is about

Alan Gale, a weak second son reborn into a minor noble family, is sent to claim a deadly frontier island and awakens a system that rewards him for killing dark creatures and developing territory. After surviving the challenge, he sets out to build a hidden domain in the lawless desert, using his system, combat strength, and practical ingenuity to gather settlers and expand his influence.