C2196 I Knew That It Wouldn't Work

How do you get this Void Ash?

Ye Feng looked down and discovered that the ash required burning the trunk of the World Tree. The flames needed for this were the "Blazing Flames," the hottest fire!

Blazing Flames—Ye Feng happened to have them, and he also knew the location of the World Tree. The World Tree wasn't considered a treasure; anyone with some level of cultivation knew where it was