Chapter 732: Going Back in Time, Space-Time Dao Mark (2)

In the Endless Chaos Sea, Cui Heng clapped his hands gently and felt the subtle changes in the past timeline. He could not help but sigh in his heart. "After reaching the Peak of the Mid-stage Return to Void Realm, there's no need to make any changes to the past. It's more hidden and difficult to detect."

As he directly attacked using "his past self" and did not cross the River of Time to attack the past, the River of Time did not show any clear fluctuations.

Even a perfected Heavenless Realm Immortal Emperor would not be able to discover such a change in the timeline.

This was because no matter how powerful an Immortal Emperor was, they were still entangled in the River of Time. After enduring a huge amount of the corrosion of time, it was impossible to differentiate such subtle time fluctuations.

Only cultivators who had reached the Mid-stage Return to Void realm could easily sense the abnormality of the past.