C671 Finding the Azure Nether Milk

Faang Yu did not waste any time. It was said that the Desolate Dragon Valley only opened for a month. Once the time was up, if he did not leave in time, he would be trapped in the Desolate Dragon Valley for ten years, and he might even encounter some 'unknown' dangers at any time.

Of course, this 'unknown' did not mean that he would encounter ghosts or something like that. Instead