I'm Zak  I've been chosen to be the Apostle of Death, by an AI called Bagley.  He wants me to stop the invasion of a people known as Beast Clan, who will come to Earth and subjugate humanity. Only thing is....as the Apostle of Death, I can only grow strong through the intake of souls and Bagley wants me to kill people to get souls.  When I reject him, he puts a timer on me. If I don't kill something each day, I'll die.  Will I survive in time to save Earth or will I die in the next 24hrs.  Worldbuilding  Modern day  Weak to Strong MC