Summoned as a Demon Pet, I Sign In for the Ancient Desolate Sacred Body from the Start

My name is Su Linglong, a genius student at Qinghang Academy, hailed as the greatest prodigy in history.

Reborn three years before the world is destroyed, I have to turn things around.

I decide to use an ancient formation to summon an invincible demon pet, but to my surprise...

During the summoning, I end up calling forth a human demon pet with an F rank.

My classmates summon all kinds of magical beasts: behemoths, angels, and demons.

But my summon is nothing more than an ordinary mortal.

My name is Lin Han, an ordinary person from Blue Star.

Today, while I was lying flat at home, a black hole sucked me in.

I became a girl's summon and activated the Sign-In System.

Sign in at designated locations to receive rewards.

Sign in at Qinghang Academy and obtain the Desolate Ancient Sacred Body, capable of physically facing peerless ferocious beasts head-on!!!

Sign in at the Forbidden Land and obtain the Xuanyuan Sword, able to cut down angels with a single strike!!!

Sign in at the Summoning Arena and obtain the Law-Manifesting Heaven and Earth ability, able to crush demons with one hand!!!

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.