The Sword That Refuses to Dull

The system gave everyone a class. It gave Korrin Vane a headache. HEARTBLADE. No rank. No tree. No cooldown. One rule: the sword does not dull while its owner lives. The godborn nobles call it an insult. The city pays him anyway. For a year Korrin Vane is the man they call when they have run out of options and the man they put out of the room when the talking starts. Then they drag a mage girl into the arena on a charge everyone knows is false, and Korrin breaks the warded chain with a blacksmith's hammer. He walks out through four hundred soldiers. None of them touch him twice. An OP MC progression fantasy litRPG for readers who like an overpowered protagonist who never had to become one.