Although the doors were also covered by magic energy arrays, their simple, thin structure made it difficult to inscribe the more profound techniques of such arrays upon them, such as three-dimensional magic patterns, overlapping magic patterns, and so on. Thus, while the doors bore extensions of the magic energy arrays, they were comparatively vulnerable parts of the overall array.
One only had to look at these two buildings to know.
Every door in these two buildings had been destroyed. Even with magic energy arrays attached to them, once they were battered by large numbers of One-Eyed Wraiths, doors that should break still broke.
Therefore, when Angel saw a door that remained intact, he was actually quite surprised.
Why was the door here alone still intact?
With that question in mind, Angel approached the door. In his mind space, he rapidly constructed the "server" of the Eye of Nalda. By running the accumulated foundation of knowledge within the "server," Angel swiftly identified all sorts of information about the door.
The door's material, its dimensions, the origins of the traces left upon it... under the "server's" processing, all kinds of information gave Angel one intuitive answer after another.
Sure enough, in essence, this door was vastly different from the others.
It was made from exceptionally fine stone, of a grade that even far surpassed the materials of the building itself. This also allowed the door to bear far more magic patterns than the other doors.
Angel discovered at least a hundred magic pattern nodes related to "reinforcement" alone. The other doors, meanwhile, might have only a few magic pattern nodes such as "toughness" and "sturdiness."
That was why this door had remained intact until now: it was simply too hard.
Unfortunately, aside from the reinforcement-type magic patterns, which were extremely compatible with