--
Ren had seen the change before others did...
This isn't surprising. His sensory network is active, and it has spread far. It'd be a waste of chakra to keep it up if he couldn't even do this.
The announcement said that monsters in this realm will enter a berserk state come high noon. But that isn't exactly the case.
He had seen signs of agitation from the monsters about an hour and half before high noon. He saw them being restless and becoming active by then, but not really aggressive just yet.
The aggression came at the time mentioned by the announcement.
He saw the monsters go still for a whole minute the moment high noon broke, as if their consciousness was seized by something unseen and incredibly powerful. Then, they all collectively let out roars of defiance and rage before making their way towards the human camps nearest to them.
