The appearance of the dark entity surprised not only the female swordsman but also Ersin himself.
Based on the appraisal results he received from various experts, he was sure that this sealing crystal has a Mana Art called Energy Erosion similar to Mana Sap which is a Tier 1 skill.
However, unlike the weak Mana Sap that could easily be canceled by the target, the Energy Erosion could not be stopped until the skill was over or when the target has already depleted its energy.
This is the finest artifact that he has when dealing with someone stronger. A Grand Magus can't escape this ability so he's expecting that this 'Grand Knight' in front of him wouldn't be able to escape as well.
Once her energy was depleted, any of his Tier 2 Mana Arts can easily pierce through her flesh!
Soon, the dark entity flew toward the swordsman followed by the cloud of smoke…