Wrong Assumptions

"Alright, let's do it together." 

"Seventh Shadow, you are going to take the supportive role. We don't know how he got the strength that he has displayed before us, but it's better to not let him explore that advantage he has for now. There is another thing you must be careful about; his darkness attribute has definitely reached a mastery level above mine." 

Seventh Shadow felt ashamed that Seth was stronger than him, even though they were both at the same realm of power. Although that was natural, considering that Seth had many mystical powers and inheritances while he had only one. But if Seventh Shadow were to fight against a "normal" Mana Control peak-stage cultivator, he would be the one pressuring the enemy. 

However, hearing Third Shadow's evaluation of Seth's darkness mastery, the shame he was feeling lessened.