Initially, the Weeping Soul Red Scorpion that she killed was only a sixth tiered magical beast and that was equivalent to human's seventh levelled practitioner.
By right, it's ability should be almost the same as her.
But that red scorpion's corpse actually got split into two parts under one strike of hers.
It was then when Huang Yueli came to understand that these red scorpions should react more vigorously towards fire attribute and because of that, Lord Zhan was able to control them successfully.
"Later on, I'll release the True Phoenix Fire and help you to disrupt the Demonic Soul Red Scorpion's view. After that the three of you will attack from three different directions, taking advantage of the chaotic situation to attack it's vital spots, and try to kill it in one go! Otherwise…. Senior Brother says it will absorb a practitioner's spiritual root and we don't know if it's real or false, so anyway just try your best not to be injured by it."