To be exact, he was detected for trying to smuggle four golden core cultivators into the territory of the Purple Flower sect.
This alarmed the higher-ups of the sect. Even their patriarch was informed and became wary of an attack because of the incident.
Arthur was quickly surrounded by the only three golden core elders present in the sect at this time. The avatar of their nascent soul patriarch also appeared to monitor the situation.
Arthur explained to them that he wasn't trying to smuggle people into their sect secretly. He showed them his weapons and explained that his weapons were living beings despite having golden cores within them.
He even swore an oath to the Ethera tree to prove that he wasn't lying or trying to orchestrate a scheme. Only this was enough to convince them to let him enter their sect.
