It's the Apocalypse, So It's Only Natural for the System to Have More Functions

Zombies + Monsters and Ghosts + Three Disasters and Eight Calamities + Stockpiling Supplies + Pocket Dimension

This is a bizarre world. Zhang Zhen activates an all-purpose System, prized for its versatility and capable of anything.

Zhang Zhen was born with a miniature world inside him, complete with mountains and rivers and twice the area of Earth. He can collect whatever he wants.

Don't fear the zombies. He has the abilities of a martial arts grandmaster and is invincible across the world, with mastery of every weapon and fighting style.

Can't get through a door? Don't worry, he can walk through walls. Someone wants to fight? Don't worry, he can turn invisible. Beautiful ladies, don't be afraid, his clones will protect you...