Weird Resurrection: My Undead Unlimited Upgrades

When he woke up, Fang Ning found that he had been transported into a parallel world. Not only that, a terrible disaster had occurred in this world at the same time. From the initial appearance of zombies, to the later mutation of ferocious beasts, even demons from other worlds began to arrive. Humanity is struggling to survive in a catastrophic world. Fortunately, Fang Ning has awakened the Undead Emperor System, which allows him to summon undead from the undead world to fight, and he can infinitely upgrade his summoned undead. Summon a skeleton soldier and infinitely upgrade it to become a skeleton tyrant! Command an army of hundreds of millions of skeletons in the world of the undead! Summon a bone dragon, infinitely upgrade it to the dragon of the underworld, and destroy a city with one breath of dragon breath! Summon a normal zombie... Facing the frightening zombie craze and demon army, Fang Ning waved his hand, and the army of hundreds of millions of undead launched a charge... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.