A blue magic circle formed on his hand. He extended his hand towards the entrance. Then within a matter of a few seconds, a barrier started to form on the entrance of the cave slowly but surely sealing whatever was inside of the cave from the outside world.
A few seconds later, a blue barrier had completely formed at the entrance of the cave, blocking the cave from the outside world.
"Done" Ryan exclaimed as tried to catch his breath.
Upon hearing that, Lucius walked towards the barrier and knocked on it to check the study ability of the barrier.
As he knocked on the barrier, he realized that it was sturdy and that it would be very difficult for the demons to break it. However, they were questions that he had in his mind.
"How will the barrier maintain itself since you can't supply mana to it continuously? '' Lucius asked, his voice carrying curiosity.
