In Blue Star Online, I can see the career advancement path.

(No academy, just straight to the point! A brand new, exhilarating, all-encompassing gaming novel!)
Job [Juggler] + Material [Enchanted Chicken Tail Feather] = Job [Shadow]!
Class [Mage] + Material [1000 Joules 220V AC] = Class [Lightning Mage]!
Class [Shieldbearer] + Material [Earth Dragon Scale Armor x 100] = Class [Armored Guardian]!
Class [Armored Guardian] + Material [Dragon Heart] = Class [Dark Armor]!
Jiang Shu, who had just torn apart an ancient mecha with his bare hands, was pulled into the God-level Secret Realm. He looked at the three-headed hellhound, which resembled an ancient demonic mountain, splitting into three bodies, and a cold smile appeared on his lips.
Behind him, dozens of clones slowly emerged from the shadow space.
[Thunder Controller], [Grand Yin-Yang Master], [Dark Armor], [Martial Ancestor], [Hammer of Destruction], [Sword Master], [Star-Shattering Bow], [Templar Knight]...
Dozens of figures unleashed their power simultaneously, their earth-shattering attacks reducing the three-headed hellhound to dust!
My achievements today are all thanks to my unremitting efforts.
Doppelgangers, kill them!
One man can form an army, and even the gods will retreat!