A Hundred-Billion Career Simulator, Starting as the Flame Lord

[Everyone gets a class + warrior build + healer + archer + blacksmith + defense towers + undead build + beast-taming build + forbidden-spell mage + secret-realm build] In a world where everyone gets a class, other people can only obtain one. Chen Xian gets to try out a different class every month. Once the trial ends, he gains one active skill and one passive skill from that class. As a result, his skills get weirder and weirder. Flame Lord: [Fireball] + [Infinite Upgrade] = [Nuclear Explosion] Beast-Taming Breeder: [Beast Breeding] + [Beast Contract] + [Infinite Upgrade] = [Beastkin Clan] Divine Blacksmith: [Equipment Slots] + [Infinite Upgrade] = [Infinite Equipment Slots] When secret realms invade and countless human powerhouses die, humanity stands on the brink of extinction. Chen Xian rides a Nine Heavens Ice Dragon King, clad in countless divine-grade pieces of equipment, with countless divine beasts, an undead army, and a mechanical army following close behind. With a wave of his hand, a fireball the size of a planet appears... In an instant, every creature in the secret realm is blown to pieces.