In the past timeline, people didn't know how Zeno worked at first.
So, when the players started switching to the other side, they started their complaints about their Zeno not working.
Since no Demon had been killed yet, or no player was killed by a Demon, they didn't know the rules.
But when the players switched, they became Demons in name.
As per the rules, when a player killed a Demon or a Demon killed a player, the one that was killed couldn't enter the game ever again and their Zeno would die.
This was the first spark that helped people on Earth realize that this was not a game.
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Arlon and Syme sat across from each other, the faint crackling of torches the only sound besides the steady tapping of chess pieces against the board.
"I didn't know any other race would know about our game," Syme said, studying the board with mild curiosity.
"Well, we also have this game in our world," Arlon replied, moving a knight forward.
