My Sword Is Suspiciously Overpowered

Gu Lin's cultivation talent? Bottom-tier. His prized possession? A rusty ancestral iron sword he polishes obsessively while his sect brothers mock him. But when the Outer Sect Tournament forces him into the arena against a disciple wielding a top-grade magical blade, something impossible happens—his humble iron sword hums once and obliterates the competition. The truth dawns on Gu Lin with equal parts horror and amusement: his sword isn't ordinary. It's cultivating on its own, growing stronger with every polish, and it's advancing far faster than any human ever could.