Invincible! This person has lived for a billion years - Chapter 539 I think being a mode of transportation is quite good.

“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

Juvenile Qin Chen, the star gate was taken, repaired as abolished, but it was awakened to the memory of the nine ninth, and opened the tenth journey of the sky. Wanjie is a book, I write a pen and write a thousand worlds. The hundred fields are mountains, my heart is the sea, and I walk out of the heavens. Hand Optimus, foot on the ground, this world, I am the emperor, who, dare not to accept?

- Description from sobiquge.com

New Synopsis by a reader:Embark on a gripping journey through a mysterious fantasy world where one man's resilience is tested to its limits. He is cast into this unforgiving world with nothing to his name. Our protagonist is swiftly swept into the ranks of the Legion, where survival is a daily struggle. Amidst the chaos of battle and the constant threat of danger, he must hone his skills and unlock his latent potential, navigating a landscape fraught with peril and uncertainty.With each trial and tribulation, he discovers new depths to his abilities, grappling with a burgeoning magic system and the harsh realities of his surroundings. This gripping slice-of-life narrative blends elements of LitRPG with a captivating tale of growth and survival as our hero fights to find his place in a world where nothing comes easy and every victory is hard-earned. Will he rise to the challenge and survive amidst the chaos, or will he succumb to the perils that lurk at every turn?

Luciel Ashford was a powerful vampire hunter who fought for humanity's survival in a dystopian world that was being overrun by supernatural creatures.After being sent on a simple mission to eradicate a vampire nest that appeared near one of the human colonies, no one expected one of the most powerful beings to appear - the vampire king, Alukah.In a big showdown that was thought to be the start of a new era, Luciel faced off against Alukah. He won the battle but at a price. That night marked the fall of humanity's hero.Turned into a vampire, discriminated and hunted by the humans he fought for, he is going to answer their call for help once more to protect the people he cares about.Torn between the two worlds, he is going to climb back to the top, forging his own path while still trying to keep his morals intact.“Well, I have a message for you, god. Screw you!!!”_______________!!!WARNING!!!For those who came for the system, you can expect it to see after ch80. Reason being is that the focus is more on cultivation.The system is just a tool for better understanding of the story that's about to come!