Gravis walked over to the Lightning Ultimate for the first time. Gravis already knew that the Lightning Ultimate was jealous of him since he had comprehended a Law that the Lightning Ultimate had wanted to comprehend for thousands of years. Yet, that wasn't important right now. The Lightning Ultimate wouldn't attack Gravis with Meadow present.
Gravis looked at the different displays of lightning and how they worked. For the first time, he was actually trying to comprehend lightning. Every time he had some time to comprehend Laws, he chose to comprehend other Laws since he didn't have access to them whenever he wanted.
Gravis was lightning, and since he was lightning, he had an unprecedented affinity towards it. The Lightning Laws wouldn't be difficult for him to comprehend.