You Are Lorius

"He's not regenerating," Arthur muttered and jumped to avoid the giant wolf's claw. "Is it because he was frozen?" He couldn't think of any other explanation. "Dia!"

"Get frozen!" Dia soared behind Arthur and clapped her hands. An Ice Domain began to freeze the surrounding. Traitor's moves became more sluggish, and Arthur found his opening.

"Now!" Arthur bolted forward as he used his release rune to burn half of his mana. After he restructured his soul, his mana increased by a large margin.

The power held within his ethereal fist was nothing that his right arm can wield. Arthur realized this was the reason for the increase in his strength. The semi-physical arm wouldn't get hurt even if he channeled all the power from the Release Rune, unlike his previous left arm.