The chaos knight was actually gambling his soul for a chance to kill Strawberry and Zultan, by overusing his core he would also be using large part of his soul but he doesn't regret anything, for him being able to kill these two is all worth it.
He aims his fist and clenched hard, his eyes were shimmering with excitement as he saw Strawberry's extremely close and panicked expression, he knew that he had won on his gamble.
Bang! Crack! A loud thud and cracking could be heard, Strawberry was holding her sword in front of her but the scene in front of her was different from what she had expected.
A scimitar was embedded on the core of the chaos knight, it destroyed the core making the chaos knight to stop on his track, he looks at Zultan and saw his somewhat hollow eyes looking at him with his hand raised and was making a 'come back' gesture.