Zhao Guang didn't immediately destroy the stone, because he was worried there might be something inside.
Zhao Guang carefully felt the inside of the stone, then little by little, compared it to find the original position of the brick. Based on the remnants here, he tried to deduce some of the original traces.
"This really is a very ancient method of arranging a magic array, I'm glad I knew it."
This ancient method is now rarely studied by mages, limited only to those who know of it.
If it weren't for Zhao Guang, who studies everything and uses everything to research and compile, he might have had to go back and investigate. But now, it wasn't so troublesome, as Zhao Guang restored the traces bit by bit.
Fortunately, the original creator here maintained a very high quality of workmanship. Even after thousands of years, some traces still remained.
Plus, Zhao Guang being a Great Mage of the Spiritual System, he was able to perceive the remaining parts based on these traces.
