Investment Return System, Start by taking Demon Empress as a Disciple - Chapter 13: Returning to Void Realm, Trump card is used

In a galaxy ruled by warlords, guilds, and ancient tech cults, Kai Zareth is just another debt-ridden scavenger—until a legendary system descends upon him.“One Trader per 10,000 light years. One chance to rise.”Selected by the Cosmic Trade Nexus, Kai becomes the sole wielder of the Galactic Exchange System, a multidimensional platform that allows him to buy and sell across parallel worlds, forgotten realms, and alien civilizations.With only 12 hours to complete his first trade—or lose everything—Kai scrambles to make deals in a universe where information is power and one wrong barter could cost your life.From selling enchanted goblin toothbrushes in toxic slums to outwitting rival system users and forging alliances with forgotten races, Kai must build his empire item by item, realm by realm.But in a galaxy where traders kill for profit and system users are hunted like prey, being the Merchant Sovereign might be a bigger curse than a blessing.

WARN:

SLIGHT ROMANCE!! NO HAREM!! FAMILY GENRE!!

Filled with political intrigue, warfare, adventure, friendship, and betrayal.

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Synopsis:

I transmigrated into a novel that I read years ago as the second Prince of the Chrono Empire and was fated to be killed by my half-brother, the First Prince at the age of 12.

So, What's my role in this novel?

Am I the villain?

Am I an insignificant extra?

Am I the protagonist? Nah, definitely not.

But, why bother?

Following the novel's plot isn't my style and I won't let it dictates my life.

Regardless of my role, I am the main character of my own life.

She is the Crown Prince’s fiancee, but on the night of their wedding, an edict was made and she was given off to marry the crippled and paralyzed God of War.

“Host, you are about to load the sci-fi adventure system, please be prepared”
“Three Body”.
“Wandering Earth”.
“Interstellar”.
“Gravity”.
“Mars Rescue”.

Uh …
As the youngest full-time professor of mathematics in the history of Jiangcheng University, Pang Xuelin was a bit stressed.
Uh …
The hardest science fiction, the best times.

- Description from Qidian