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The Heavenly Sundial, or Jun Tian Sundial, was an immortal artifact containing the power of Law of Time. It was a golden disc with patterns carved on it. There was a bulge about the size of a thumb at the center with a golden needle stuck in it. It possessed the ability to alter the flow of time in the outside world. One day outside would be equivalent to a month or even a year. It was indeed very mysterious. It's just that activating the artifact would require a massive expenditure of immortal essence stones and the power of time laws.

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