Li Shiming suddenly got interested, he took stock of the available Fourth-grade Spirit Pills he made, and figured he could possibly win the Fourth-grade 'Dragon Sand Secret Crystal'.
The Fourth-grade 'Dragon Sand Secret Crystal' is the top Artifact Refining Material he had always anticipated. Although it is not a thunder attribute material, due to its smooth properties, it is compatible with the Five Elements and Thunder Attribute Spiritual Power. Most importantly, the 'Dragon Sand Secret Crystal' is extremely hard, capable of enduring about forty million 5-nanometer runes.
This means that given his Artifact Refining ability, the 'Dragon Sand Secret Crystal' can be refined into a Fourth-grade Artifact Tribulation Flying Sword.
For the sake of the 'Dragon Sand Secret Crystal', he could use up all his accumulated unused Fourth-grade Spirit Pills, which was worth it.