Assassin Wu Liuqi: Saving the Girl in White

The story starts from Season 5. Wu Liuqi has a pair of scissors, Chief Seven has the demon blade Thousand Blades. But I, Lu Jiu, wield a giant sword that transforms into armor—the Demon Blade Sharp Edge. Lu Jiu transmigrates into the world of Scissor Seven, becoming Seven's big brother. Six years ago, they trained together as the strongest duo of assassins. But after an accident, Lu Jiu fell into the glacier mountains. However, he didn't die; instead, he gained the Demon Blade Sharp Edge. Not only can it transform into armor, but its power is terrifying—one slash deals 999+ damage.