I Inherit An Auction House At The Start, Trillion Times Rebate! - Chapter 788 - The World Tree Appears

Bai Zishi has an extraordinary sensitivity to jade since he was a child.
By chance, he came to a place with the same technological level as the earth,
There are no women on this planet, only orcs who can transform and sub-orcs who cannot transform.
Orcs defend their homes and evolve with gems, and the most powerful gemstone is emerald.
This led to the birth of a noble profession in the Boya Continent-the Stone Gambler!

Content Tags: Different World Continent Farming Culture Traveling Through Time and Space Ability
Search keywords: Protagonist: Bai Zishi, Vincent Karen Garcia ┃ Supporting role: ABC in the world of orcs ┃ Others: orcs, domineering

- Description from novelbuddy

Quinn Winter is a young man from another world. One day, he is suddenly chosen to become the new Demon King. But the Demon Kingdom is in big trouble – it's losing a terrible war against the human kingdom called Gran'le.To help his people, Quinn comes up with a risky plan. He will sneak into Gran'le and learn their secrets. But things don’t go as planned. A powerful noble sponsors him, and he ends up joining Heavenward Academy, the top school for training future heroes.At the Academy, there's a big challenge called the Selection. The best students become Paladins – magic knights who fight demons. Quinn doesn’t want to become a Paladin. He is a demon king! But now, he’s stuck in the Selection… and if he wins, he’ll become the very thing he’s supposed to destroy.He started the day badly. Now, things are getting even worse.

The world that nurtured the civilization which reached the pinnacle of magic was on the verge of destruction.
The last survivor transmigrated to the past, when the magic civilization started growing, as countless mages were still fumbling their ways through the thorny paths of magic knowledge.
He, who came from the end of the magic era, aim to reach the pinnacle of magic.

After transmigrating into a weak noble body, Marvin discovered that he was familiar with the world, this was the game he played in his previous life and… Damn! He only had six months before the Great Calamity!