Thoughts of Trading Gu

It was fine if Reverse Flow River was outside, but if it stayed in the immortal aperture for long, it would consume a lot of heaven and earth qi. Once he lacked heaven and earth qi, his immortal aperture would be unstable.

Thus, Fang Yuan had to constantly place his immortal aperture outside to absorb heaven and earth qi and replenish it.

After he finished his absorption, Fang Yuan closed his immortal aperture's entrance.

Arriving at Reverse Flow River, he held an immortal zombie body.

It was his original body.

He tossed the immortal zombie into Reverse Flow River.

The immortal zombie body flowed along it.

Using perseverance Immortal Gu and Reverse Flow River, Fang Yuan made his experiments, he used all of the methods he could think of.

However, it was pointless.

"As expected."