He was aware that neither the demons nor the angels had seen these runes before, and if Harry had been serious when he mentioned that someone had died here before—that is, if he had included that information in his writings—then it meant that the person who had placed these two runes was none other than him.
It was a perfect skill. It was an incredibly masterful thing to do. Even Atlas himself couldn't have done something so masterful with the God Language Arts book in his hand and the runes inside it. After all, there were only a few runes in the book that were as high-quality as this one.
It was very clever. This rune had incredible magical power, and Atlas could sense the insane amount of meaning within this magic, which was even more dangerous than the magic itself.
In short, Harry had thought carefully. If anyone other than the seven powerful and bright spirits he saw in his dreams tried this, death would overtake him or them.