You Don't Want the S-class Bone Dragon, You Choose the C-class Zombie?

Undead invasion, apocalypse.

In order to survive, humans made pacts with the dead to fight against demons.

Powerful undead have become a pursuit for humanity.

Contract date.

Wang Yu, however, did the opposite, abandoning the SSS-level Undead Bone Dragon King and the SSS-level Bone Dragon Knight in favor of a sallow-faced, malnourished zombie...

Simply because he possesses a super-powerful evolution system.

"Since the undead can't save the world, then surely my undead can evolve into Pangu?"

...

Eighteen years old.

At the age of high school graduation, while other Spirit Masters were struggling to fight low-level demons, Wang Yu was tearing apart a demon god in the starry sky.