Arthur always knew that despite his dwindling emotions, his rage was unaffected. It was the same rage against his father that never faded. This rage knew no bounds, which Arthur found familiar. He felt this rage against Amelio, too, when he attacked Kera.
It was now rising from within his heart, boiling his blood and scorching his skin. Arthur felt like he had swallowed jet fuel, which was now burning within his vessels.
His mana grew chaotic as his vision narrowed to see nothing but Cassius standing there. The arrogant creature further enraged Arthur, making him want to tear that face apart.
The last thought surprised Arthur and made him snap back to reality. His rage dissipated as he reigned it inside, wondering what overtook him. Although he wanted to kill before, he never wanted to inflict pain or torture his opponents.