Dragon Egg?

And one of the ways to find it was through medicine.

Su Han searched through his miscellaneous ring for related books. Soon, he found a notebook that recorded a certain potion formula.

"Did you get this from Nova's Ring?" Su Han flipped open the notebook and read it carefully.

"Divine Enhancement Potion: A complete upgrade on the basis of the Magic Enhancement Potion. It can greatly increase the speed of the cultivation of second to third rank spiritual power."

After Su Han saw the formula of the potion, a smile appeared on his face.