These invisible snakes belonged to Carpentine, they live in that sealed world and their only purpose is to track targets. Arthur was in possession of a thousand of them and as long as he dedicates all his power, even that thief can't escape from him. Sooner or later, that old man will show himself again inside the city and that's when the parasite will strike.
With all thousand invisible tiny snakes dispersed, each searching in an area, Arthur returned to Shen Shen's side and continued shopping. Although the king invited him to stay over, Arthur preferred the inn because it felt much safer than entering a tiger's den. Zaarae isn't with him yet and it's too early to trust the Fallen God Clan, then again, there's no need to purpose provoke them either.
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