Although roots are usually invisible, they are the most critical and vulnerable part of a plant, unable to withstand fierce attacks. However, protected by the soil, they are rarely damaged, and few can attack them within the soil.
The petals of the Red Flower Demonic Beast were like clad in invincible armor, repelling all of Qin Sisi's Magic skills, but its roots were not nearly as tough. Under the bombardment of the Sword of Yama, they suffered heavy damage.
Plant-based Demonic Beasts rely heavily on their root systems to absorb energy from the soil. Now that the root system was destroyed, the aura of the Red Flower Demonic Beast immediately became much weaker.
After severely damaging the roots of the Red Flower Demonic Beast, Qin Sisi quickly swallowed a Spirit Revitalizing Pill, then leaped up from the soil and once again unleashed the Magic skill of the Sword of Yama towards the flower of the Red Flower Demonic Beast.