The power Arthur felt was something he had not felt before. It was akin to the time he first got his bloodline, which turned his weak body into something incredible!
Those attributes were insane, and now that Arthur was an Official Mage, all the spells he knew could be cast as 11 tier spells.
The reason for it was because of his essences. He could use them to buff his spells, and not everyone could do that. Arthur's system played a huge role in helping him achieve the feat.
He moved around the island, getting used to his new empowered body. Signy and Helga watched everything, and could feel the power behind each action Arthur took.
"Kiddo, these two are cute. Maybe you could introduce me to them? But only if they were birds too…"
"Ikarus? Don't tell me you can speak? My days of peace are over."
"You are a lucky bastard. I will have to slumber after stopping the inheritance from killing you, but I will be back to haunt you!" Ikarus said.