I have countless protagonists and guardian spirits

The protagonist is the main character in drama, film and television, and ACGN works. It is commonly understood as two protagonists, male and female.
There can be many protagonists in a story, as long as the standpoints and angles are different, the villain can also become the protagonist, and each protagonist has something different from ordinary people.
One day, I suddenly discovered that I could summon the protagonists in those stories to be my guardian spirits, and I felt like I was going to be invincible.
"Congratulations to the host for obtaining the guardian spirit Shi Hao."
"Um, can I return that system?"
PS: If you want to see the invincible Shenjin from the beginning, the world and characters that will appear are based on this book.

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