Sky's Mercy

Sky's Mercy first appears in Blackflame as a mysterious, high-level sacred instrument whose true nature is only hinted at through cryptic references. Across the series it evolves from an enigmatic relic into a pivotal artifact whose powers and history become central to the world's fate. Its gradual unveiling mirrors the protagonists' own growth, transforming from a distant legend into an active force that shapes both personal destinies and cosmic balance.