Kill The Ranger!!!

Deviants, monsters brought through cracks in the world terrorize humanity. Among these many monsters lies a beast known only as the "ranger," a creature with the supposed ability to grant any one wish, though only through a certain condition.
Killing the ranger and bringing its head to a suspicious deity.

Due to this rumor being spread amongst both humanity and the deviants the ranger has no choice but to run and fight constantly. How exactly will he manage to survive for very long with this wish floating above his head and will he capable of keeping his promise to never allow the innocent to be harmed? Fight on Ranger!