I Transmigrated to the Apocalypse and Gained an Absolute Domain!

[System, transmigration, invincible, supernatural powers, zombies, mutated beasts, decisive and ruthless, no female lead] On Blue Star, some time after the apocalypse began, a pawnshop quietly opens on a commercial street crawling with zombies. System, are you seriously opening a pawnshop in the apocalypse? [I believe in you!] System, where’s the promised newbie gift pack? [Are those two holes in your nose just for show?!] I… Fine, fine! So that’s how we’re playing it! Invincible?! If you put it that way, I’m wide awake now! While everyone else is risking their lives for a bite to eat, the protagonist sits in his pawnshop, staring at shelves full of food and worrying about what to eat. While everyone else is fighting monsters to raise their ability levels, the protagonist sits in the pawnshop and says, with a touch of humblebragging: “As a pawnshop owner, it’s only reasonable for me to be a little invincible!” I’m just an owner who wants to earn a tiny bit of pawn value in this apocalypse. If you’ve come to pawn something, you’re very welcome. If you’ve come to rob the shop, I’ll applaud you. You’re all walking pawn value! What? You’re a ninth-rank ability user? Sorry, see those people kneeling over there? They’re all tenth-rank ability users. What? You’re a Martial King? Sorry, I just accidentally killed two Martial Venerables. No matter how strong you are or what faction you belong to! Even an immortal who comes to rob me will leave their life behind! That’s final!