Global Cataclysm: From the Start, I Change Class into a Lich King

[Undead Calamity + Decisive and Ruthless] Fate whispered to Yang Bin: “You cannot withstand the Calamity.” Yang Bin whispered back: “I am the Calamity!” Billions of zombies, a sea of skeletons. Blackblade knights with spears and halberds standing like a forest, pale banshees blotting out the sky. The bones of gods piled into a throne, a death angel crowning him. ... Legendary necromancer Yang Bin is reborn before the cataclysm arrives. From the start, he seizes an opportunity and changes class into the five-star hidden class, Lich King. While everyone else is still at a loss, Yang Bin forms an undead legion and sweeps through the city. While others are overjoyed to get ordinary gear, Yang Bin has already assembled a full set of god-tier equipment. Being half a step ahead makes you a genius. Yang Bin, who is ahead of his era, aims to become the supreme ruler!