When Vicente activated his first ability, he immediately felt all the metals around the building, feeling more control and less weight on his consciousness.
When he activated his ability, he had to focus on a particular amount of metals, and if he couldn't control that, he would feel pressured because there were more metals around him than he could handle.
But as he got stronger, Vicente felt that he could control more and more metals, and the pressure he felt from what was beyond his control diminished.
This was a somewhat obvious breakthrough for him after he had greatly increased his understanding and the mana density in his body. But beyond that, Vicente felt he could go further with spells involving the Earth and Lightning elements.
He furrowed his brow and felt the Earth around his building, realizing that if he wanted to, he could subtly manipulate part of the walls of his property at will.