I was originally the strongest person in the world, guarding the gates for the human race for more than ten years.
But bad news is coming outside the border, and the only relative is dead.
Died in the human race's plot against the alien race.
He swore to pay with blood. After using the ancient secret method, the alien race was wiped out and the blood debt had to be tasted.
I was reborn when I was supposed to die, but it seems that history cannot be changed!
I died and lived again, lived and died again... Reincarnation?