The solid ice that froze Yuan Dasheng originated from the means of one of the commanders of the Forbidden Army under the Lord of Wangchuan.
This is not only of the ice attribute but also incorporates the principle of mysterious Yin.
Ning Zhuo can penetrate the ice attribute with his Water Realm, but he doesn't quite understand the principle of mysterious Yin. Therefore, he cannot devise a spell against solid ice based on the Five Elements Realm.
And the yellow dust covering Mengye Tiger from the inside out, although it is of the Earth Element, it originates from the Divine Separation of the Lord of Wangchuan.
Thus, it is no longer merely Earth Element, but it retains the mighty powers of the divine skills from the Lord of Wangchuan's avatar.
The Five Elements Life and Death Fan cannot shake the divine skills.
After all, it's just a Magic Artifact, not a Magic Treasure.