Danmachi: The elven prince

Jack was reincarnated by an evil god who gave Jack 5 wishes. But on the condition that he worships the evil god everyday by killing someone. Jack agrees immediately because he was a murderer who only killed murderers. What will Jack do? (Mc will be very overpowered) (I speak English but grammar might be terrible in some chapters and better in other chapters just depends if I put more time into it)