A Great Tonic

"You wait here for a moment while I investigate," Yuan Ming said, then sat down cross-legged.

He half-closed his eyes and drove the roots of the Undying Tree in his dantian deep underground, quickly piercing into an underground spirit vein.

The next moment, Yuan Ming sensed that the Fire Attribute spiritual power within the underground spirit vein here was nearly half again as abundant as that at Volcanic Peak Mountain outside.

Guided by instinct, the Undying Tree began greedily absorbing the underground spiritual power.

Yuan Ming did not allow the Undying Tree to continue unchecked. He controlled its roots and swiftly investigated the flow of the underground spirit vein.

Before long, he discovered the direction in which the spiritual power flowed through this underground spirit vein.

"We have a direction. We'll go that way," Yuan Ming said, rising to his feet and pointing ahead.

Wulu was delighted to hear this, and the two immediately flew in that direction.

The path of the earth vein's flow twisted and turned, but its general direction could not be wrong. Only after fleeing more than a hundred li did the two land again.

Yuan Ming had Wulu rest briefly while he repeated his previous method. After further confirming the flow direction of the underground fire vein, they set out once more.

After repeating this twice, the spirit vein they had been tracing came to an end and merged into another, larger spirit vein.

Yuan Ming controlled the Undying Tree to ascertain the flow of spiritual power in this larger vein, then continued onward.

Time passed bit by bit. The territory they crossed grew broader and broader, while the landscape below changed from an unchanging Gobi wasteland into rolling hills, then into ranges of mountains bearing obvious marks of wind erosion.

Across the vast plains,