Honkai Impact 3: Saving the Former Civilization by Rubbing Black Technology

With a strange system that claims that "even a fool can do scientific research", Ai Yue traveled to this era that is destined to be destroyed.

However, when he saw the name of the project called "Plasma Spark Tower" at the top of the technology tree displayed by the system, he realized that someone was going to be unlucky.

The thirteen heroes may not be able to defeat the Herrscher of the End, but what about 1.3 billion heroes, or even 3 billion heroes?

End, you will be defeated by my Zapelio Ray!