Fake Sun?

The unexpected development of a Solar System filled William with joy. It seemed that comprehending his Elements had yet another bonus that would only appear after the Elements reached Ascended C-Rank.

The more William comprehended an Elemental Affinity, the more control he had over its Magic. When the comprehension reaches one hundred percent, William gains access to the Element's Primary Law, Definition as Law.

After this point, turning his intent into a simple phrase allowed William to use Laws that were nearly invincible unless they were countered by another Law. To deal with a Law using normal Magic... it would require too many resources.

After the Primary Laws came Secondary Laws, which were still a mystery to William. He could only speculate.

But it turns out that there was something in between Primary and Secondary Laws! The Solar System! And its development came with a wave of one hundred and fifty Ascended Points!