C1479 Powerful Oppression!

Within the Black Stone Pillar, Ye Xu's brows furrowed slightly as he struggled with the orange flame, which proved to be several notches more difficult to master than the purple flame, merging at an agonizingly slow pace.

He had already spent a good two to three hours inside the pillar, and yet he had managed to fuse less than half of the flame.

"This is really tough