But Eureka was different.
Eureka's Heavy Magic Zone had originally been brought about by the Perching Giant Tree.
It was extremely mild.
Not only was it suitable for Long-lived Species to live in, it was even suitable for ordinary people.
So there was no need to put effort into that aspect.
Thus, Lan Qingyou directly changed the original soothing effect into a locking effect.
Its logic was completely opposite to that of a city-level Magic Array.
What did that mean?
Simply put, it prevented Eureka's Magic Power from leaking out.
Thereby maximizing efficiency.
Though this Pure Magic Zone was better than nothing to her,
the many subjects living on it could still benefit from it.
As long as someone benefited,
then making it could not be wrong.
More hands, more helpers...
Of course,
aside from Lan Qingyou herself, the other Black Witches had naturally helped with the renovation as well.
The main contributors were still that bunch from the Magic Array Research Association.
No one was happier than them to be able to learn a new Magic Array.
When Lan Qingyou announced that she needed people to construct city-level Magic Arrays, they had practically rushed over headlong.
Therefore,
with sufficient manpower,
Lan Qingyou still chose to use assembled iron plates.
Although a single solid iron plate did have its advantages,
that was suited to building a Pure Magic Zone from scratch.
For Eureka, which was already a Pure Magic Zone,
this kind of one-piece covering method was clearly unsuitable.
Because it would directly cover every area.
Though space could be left reserved,
that was simply too troublesome.
And don't forget,
Eureka also had the Thunder-Roaring Ancient Tree Altar.
That lightning could fill in missing Magic Array symbols and Magic Circuits.
Though no one knew the principle behind it,
with this,