It wouldn't be an exaggeration to say that the sixth shadow devil king was the five shadow devils combined into one. And it possessed extremely terrifying strength.
It defense was even more monstrous than that of Li Yunmu, it had more formidable vitality compared to him, as well as more powerful battle prowess and even assassination skills which Li Yunmu didn't have.
Moreover, also it had true sight which could see through all traps of the enemy.
But the sixth type of shadow devil, the shadow devil king had a limitation—there could only be one shadow devil king at a time. It meant that even if Li Yunmu had eleven shadows and could easily create two shadow devil kings, he could only create one.
Moreover, in the future, even if the number of his shadows increased, he would still only be able to congeal one shadow devil king.