In the 131 th episode, the magic crystal core

troops are advancing, but the advancing area is incomparably large. Because Li Donglei said that the army was poor, and had no money to buy magic wands, robes or horses, armor and sabres. The magician himself hit the magic crystal core of the Warcraft, and then he spent money to make it. The swordsman also hit the magic crystal core. In the future, he asked the dwarves to help refine weapons as expenses. If you can't fight, you have no weapons.

only Warcraft above level 4 has magic crystal nucleus. As soon as the army entered the fourth level Warcraft area...