I Have a Black-Hearted Merchant System

What? Didn't I die together with the Zombie King? Why didn't you die? 2035? What the hell, why is it the end of the world again! ! ! Fortunately, the black-hearted merchant system was awakened. What kind of powerful tenth-level man was scratched by a zombie? Want healing fluid. Yes, you can become my little brother. Oh my god, system level 5 can actually travel between planes? He can become the king of all realms and become immortal! Stop talking and sell things quickly! There will be Little Joy, Fairy Sword, Great Desolate World, Journey to the West to Multiple Worlds later... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.