C130 Inter- and Exogenous

Jiu You was King of Killers from the Blood Slaughter Organization, the strongest in the world of assassins and also an [S] class expert.

The Blood Slaughter Group was the largest group of assassins in Underground World. Because it had Tartarus overseeing it, it could just barely be considered an [S] class power.

However, in front of a true [S] class power, Blood Slaughter was still far off