Starting As an F-rank Necromancer, Fusing and Transforming Into the Grim Reaper

A global cataclysm has struck, bringing calamity and rampaging monsters. To combat these monsters, the world has been digitized, and everyone at eighteen undergoes an awakening process to acquire a combat or support class, leveling up and becoming stronger by slaying monsters. Gu Qing starts by awakening the F-rank combat class, the Necromancer, only to be mocked as a weakling capable of summoning two skeletons. However, Gu Qing unlocks an infinite class encyclopedia; as long as a class's proficiency is maxed out, a new class can be unlocked, and classes can even be fused. [Necromancer] + [God-level Chef] = Hidden Class [Undead Lord]; [Beastmaster] + [Goddess Apostle] = Unique Class [Spirit Lord]; [Shadow Overlord] + [Blood Emperor] + [Undead Lord] = Mythical Class [Death God]. Soon after, an evil god invades, and Gu Qing faces it alone, commanding a million-strong undead army, surrounded by goddesses of various races, shattering the evil god with a single strike...