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Since capturing the Returning Ruins Divine Wind at the ruins of the Fan Guang Sect, Su Yuan immediately initiated the evolution of the Divine Wind Skill.

Before the sword battle, he spent nearly two months completing its evolution and directly elevated it to the Transformation Realm.

The Divine Wind Skill, Oath of Returning Ruins!

It allowed the user to observe their future True Self through the power of the Returning Ruins Divine Wind and borrow strength from that future self to enhance their cultivation.

Using the Oath of Returning Ruins required the consumption of Ruins Time, initially possessing four units, perfectly possessing ten units of Ruins Time.

The longer the observation and the more power borrowed, the more Ruins Time consumed.