Abel was fascinated by the power of absolute abilities. The [Equivalent Exchange] ability was heaven-defying and so were the other two. He knew that those skills were actually seriously nerfed because Kane himself was not supposed to be using absolute abilities in his low power level in the first place.
He was beginning to wonder how powerful these supposedly mediocre abilities would become when Kane becomes a knight and unlocks the full potential of these abilities. Being an absolute ability of the dao of space, only one word would perfectly describe their power, 'Terrifying'.