C496 Three Thousand Swords of Scarlet Thunder Dacheng

Ye Feng didn't expect that the quality of the Origin Weapon could be upgraded as well.

The Dragon Mark Battle Sword was a Grade A Origin Weapon. In other words, it could become a Grade S Origin Weapon after it was upgraded.

However, he needed to refine an Insect Emperor Blood before he could upgrade it.

He did not take out the Origin Weapon upgrade crystal