560 Crucial problem

Fang Yuan had just taken a step past the guest halt stele and a pleasant surprise welcomed him.

A borrow strength Gu appeared in front of him.

This was a rank five strength path Gu, it was almost completely extinct and was even more rare than all-out effort Gu. It could not be used by itself, but instead had to be used together with other Gu worms.

When matched with sky strength Gu, it could allow the Gu Master to borrow the strength of the sky. When matched with earth strength Gu, the Gu Master could borrow the strength of the earth. With fire strength Gu, it allowed the Gu Master to borrow strength from fire. With water strength Gu, the Gu Master could take gain strength from water flow.