Back in the cave abode, Zhou Yu immediately took that old tree root out from the Four Directions Realm.
Only now, when he carefully examined this old tree root, did he realize how utterly unusual it was.
At first glance, the thing looked like a dead, withered old tree root.
But when Zhou Yu held it in his hand, he discovered that this thing was not like a plant at all.
Because its weight far, far exceeded the scope of anything plant-like.
Just this section of old tree root, less than three feet long, already weighed over ten tons.
It was simply heavier than Mystic Iron of the same volume.
With Zhou Yu's current understanding of the various medicinal materials in the Primordial Realm, he still could not determine what this thing's origin was.
After turning it over and over and studying every part of the old tree root, Zhou Yu helplessly came to a conclusion.
This thing might really be some existence similar to a medicinal herb.
