The last rule put into place. A countermeasure against all the steps they took. If the person who made the rule, the fake Geto Nanami presumes, is the rules lawyer determining what the rules mean, killing him and/or Fushiguro (not that Nanami wants the kid killed) will not break the rule and thereby the game. It still won't end until all the other players are dead, a last grand 'fuck you' even if he loses.

It's terrible news. Even those who survived Shibuya are at risk of dying. Even those who are too cowardly to face the biggest threats they've ever known. He wants to take it and shove it away, break it into pieces, and fix things. Those don't all work together, but conflicting feelings are normal in the face of such horror.

"Thank you, Inumaki. I appreciate it," Nanami says, "How are you doing here, in Folkmore? It's not as bad as all that, I hope."