"Huff..."
In his room, Merlin let out a deep sigh and closed his eyes.
He put his palms together and channeled his mana throughout his body.
"Eighth Spirit Core, here I come!" he exclaimed excitedly.
Boom!
A red aura burst from his body and shot upward. Fortunately, he had placed many magic circles around him, preventing the explosion from destroying his room.
"Ugh..."
Pain spread through his muscles, bones, and flesh. It was the process of strengthening his body as it transformed to match the level of the Eighth Spirit Core.
Luckily, Merlin had solid physical strength thanks to Linda's training.
Because of that, he managed to endure the pain without screaming like a maniac.
After ten minutes, the pain gradually faded. His aura also calmed down before finally disappearing completely.
He opened his eyes with a smile.
"Hahaha! I finally broke through to the Eighth Spirit Core!" He clenched his fists excitedly.
