Lucas wanted to know the secrets to becoming a God. He had been searching for a long time, but he had never thought of ever trying to be perfect. Only after seeing Grey did this thought came to him. If an Elementalist could be perfect, then there's a high chance he could become a God.
No weakness, incredibly strong. This was a new view on things. With this insight, there's a chance that he might be able to break the curse that has plagued the Aurora Continent for countless years now.
However, when he sensed the strength of his physical body, his expression turned grim. He would need tens of years to increase the strength of his physical body to that of a Half-God stage.
The only way he had been able to increase his physical strength all this while was through breakthrough, and compared to Grey's method, it was completely different and would be weaker.