The floor that got hit by the axe suddenly burst out in a bright light that even enveloped the body of the King of Twilight Hay-lale. All the attacks that were supposed to hit the King of Twilight Hay-lale are rendered useless by the skill. The players finally noticed that this is not just a coincidence as a normal AI boss monster should not have this great battle sense.
They cannot really talk to the King of Twilight Hay-lale, but they could really feal that they are fighting against player rather than an NPC. Even if Pandemonium had NPCs that are very realistic, rankers could still more or less sense that they are fighting an NPC and they cannot mistake a battle against a player with hundreds of PVP matches in their belts.