A Sinister New Skill

"System, what is the function of the Space Crystal Core?"

[Space Crystal Core: The Space Crystal Core is a crystal core that can only be formed by B-grade zombies. It is a material for upgrading the space bag. Collecting 2 Space Crystal Cores will allow for the upgrade of the space bag.]

So that's how it is!

With the growing demand for zombies and materials, Alex's basic space bag was clearly no longer sufficient for his current needs.

Alex took out the remaining B-grade Mother-Child Resentful Zombie from his space bag and threw it into the vacant Level 3 Tomb.

[The body is being buried...]

[Estimated time 4 hours...]

"Four hours?" Alex was slightly taken aback.

When he killed the Mother-Child Resentful Zombie, he had felt it was much easier than killing the spider-form zombie.

Yet, unexpectedly, this Mother-Child Resentful Zombie seemed to be even stronger than the spider-form zombie.