Class-Changing into a Holy Envoy, the Goddess Begs Me to Appraise Forbidden Items

[Transmigration + Class Advancement for All + System cheats + Face-slapping comeback]

I transmigrated into a post-apocalyptic world a thousand years in the future.

Humanity huddles inside steel fortresses, and “Classholders” are the last line of defense.

At the class-awakening ceremony, I awakened as an SSS-rank [Holy Envoy],

only to be mocked across the internet:

“Widely recognized as the most useless class! Without holy relics, it's garbage!”

The principal watched coldly as a prodigy's fireball struck from the shadows. The whole class sat back, waiting for me to drop out in disgrace...

[Ding! Urban Exchange System activated!]

“Today's specials:

① Liuwei Dihuang Pills (8 points)

② Electric fly swatter (comes with a lightning tribulation manual)”

Looking at the “nuke-grade firecrackers” and “causality-defying fruit knife” I'd crafted by hand,

I grinned amid the ruins:

“Who says holy relics have to be dug up? I'll mass-produce them myself!”

Later

The icy school beauty blushed to the tips of her ears: “That ancient treasure you sold me... why is it rated 18+?”

The Steel City Lord knelt without getting up: “Please use this Shennong Cauldron... no, rice cooker, to make pills!”

When evildoers from myriad realms descended upon the earth, Jiang Cheng faced them alone.

“Killing you will take no more than a snap of my fingers!”

[The most useless SSS-rank class + modern technology = all the realms bow down]