Time Travel: Sign in to Receive Superpowers, I Want to Be a Monster

The protagonist awakens the system after traveling through time, signs in to receive superpowers, and achieves the life of a monster, and then travels again, and his shadow may be found in every world. There are limitations to abilities, mainly space limitations and time limitations. However, none of these can stop the protagonist from becoming a monster in various worlds. He goes further and further on the path of monster... Any shoulder, any shoulder will do; any shoulder, it's just a human being, I hope you can wake up. The characters and stories in this book are purely fictitious. Please do not imitate them. Any similarity is purely coincidental. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.