Anchors and Domains Part 2

Looking up all the records on anchors and domains, Shiro narrowed her eyes at the gradual evolution of the magic circles and noticed a small consistency among them.

"Say, older me, look at this." Shiro called out as her older self swung her chair over to her side.

"Sup."

"Look at this part of the magic circle. What is it? During all of the 'evolutions', this one has stayed constant but I can't help but notice that you have no record on what it is." Shiro asked.

"That's because it can't be analysed. It's the part that I can't figure out. I've been trying to reverse engineer the magic circle through analysing the other components but I haven't been able to figure out anything about the core component yet." The older Shiro shook her head.

"Then I'm guessing that this is probably the thing that we need to figure out then. What about domain? Surely you can set up a domain right? Since we were born in this world." Shiro asked.