A Spin

After Blake's episode with the four women that night, everyone in that room was turned to his loyal servant.

Initially, Blake's intentions had been to wipe out the memories of Nina, Robert and even Patricia, he had been against the idea of turning them into his eternal servants for two reasons.

One was that, these three people had no combat or visible utility that he could make use of, for Blake their only use was the farming of sin points.

Secondly, the eternal pact was a technique that didn't just make one his servant but also made someone an extension of him. 

Blake's eternal servants received what could be called a blessing from him, their will becoming unprecedently strong especially those of the non-rankers who suddenly found themselves able to give off an aura that would subdue even ranked beings.

These blessings came with the curse of becoming a being of the underworld, a thing which the right people could figure out and raise alarms about