The skill is a round shield, which is similar to this bubble they are fighting inside that prevents attacks that are inside from going outside.
But to create such a shield, he has to do something he has never done before.
He has to manifest mana outside him and make it take shape without a physical medium. Doing this is harder than infusing mana into his Greatsword, or coating his Greatsword with mana. Both of them use the Greatsword as a physical medium for manifestation.
Closing his eyes, he sensed the mana within him and tried to visualize it, after that, he utilized mana manipulation to control the mana out of his body. The mana in his body went out to the open, Leon gritted his teeth as he felt his mana reserve gets depleted by half, but he couldn't risk losing focus.
Gritting his teeth once again, Leon put his imagination into use, using the mana to form something similar to what he had in mind.
