Ashburn's Advancement! Wu Tu Returns!

"There's actually such a potion!?"

When Zhou Zhou saw this Potential Advancement Potion, his heart immediately pounded.

He really needed this potion!

Most of the soldiers under his command were recruited from the Gate of Summoning through recruitment books.

And at least 50% of them only had Black Iron-Tier Intermediate Grade potential!

As the recruitment books for soldiers started from Black Iron-Tier Intermediate Grade monsters, the most number of recruitment books he had were the Black Iron-Tier Intermediate Grade recruitment books.

Therefore, he had the most Black Iron-Tier Intermediate Grade soldiers under him!

If they broke through from Black Iron-Tier Elementary Grade to Black Iron-Tier Intermediate Grade, there would be no more possibility of a breakthrough.

In fact, Bai Yi had notified him about this situation before,

However, Zhou Zhou had no choice in this situation previously, so he could not resolve it.