I'm 90 years old and the system tells me it's time to create harem - Chapter 18: The Enemy’s Retaliation

Once an imperial princess, now reborn among the lowest of s*aves of the nobility.

Seth Evergreen was the greatest scientist of his time. With his insatiable hunger for knowledge and groundbreaking discoveries, he had made Earth reach new heights of prosperity and scientific advancements.

But everything changed when he stumbled upon the life equation, cracking it and discovering the fabled 'healing factor.'

Seth believed he had found the key to eternal youth and announced his discovery to the world in the form of a new drug. But then the mutations began. The human body, it seemed, was not meant to be perfect.

The drug's effects began to spiral out of control, creating monsters out of those who had taken it. After spending 7 years trying to remedy his mistake, he finally gave up and pulled the trigger.

But when he opened his eyes again, he found himself in a world unlike anything he had ever seen before. The world of Gilea, where magic and mana exist, and the strong prey on the weak.

Determined to complete what he had failed to do in his last life, Seth, now known as Silas Skylark, sets out to become the strongest mage, to take Gilea out of the dark ages and into an age of prosperity and change.

Unbeknownst to him, the life equation branded itself into his soul, morphing his body and mind into a being with only one goal...

To evolve!

But as the shadow of his past looms over him and powerful forces seek to control him, Silas must overcome weaknesses and reach new heights.

Will he succeed in his quest to bring prosperity and change to this world, or will his past sins come back to haunt him once again?

……………………………………………………………

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[Congratulations to the host for binding the Shenhao check-in system. 】

Sign in and check in to get rewards!

[Successfully signed in on time and obtained one billion assets. 】

[Sign in successfully, get the handsome face of the exiled fairy. 】

[Successfully checked in at Dongshan Villa, and obtained the ownership of Dongshan Villa. 】

…

Ever since the sign-in and clock-in system was bound, Chen Yun was either checking in or on the way to clock in.

From then on, amidst the wild flowers and the worship of the heroes, a brilliant god rose up.

In the world, I am the only one who has the name of a god!

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- Description from novelbuddy

Another entry in what you can call the Proto Harem Series: the books written before the Harem Series that take place in the same world.

It’s about a swordswoman whose student is captured, so she goes to rescue her.