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Gu Lieyang, Gu Qingxue, and Gu Jiu looked up at the sky. It was fine if they didn't look, but when they did, they were shocked. It was indeed an unimaginable existence.
If it wasn't for the fact that they were separated by a mysterious barrier, they would not have been able to withstand such a glance.
Any one of the hidden auras above was stronger than the ancestor of the Hollow Sky Palace