Neither Ravenclaw's legacy nor Slytherin's legacy contained any records of dream magic. The subject had only been proposed roughly a thousand years ago.
By then, even the bones of the Four Founders had long since crumbled to dust.
Otherwise, Harry would not have had to go all the way to the library to look for material on dream magic and waste his time.
But researching Zug was an entirely different matter.
Both Ravenclaw's legacy and Slytherin's legacy contained a wealth of material on ancient magic and ancient sorcery. Summoning evil spirits happened to fall into that category.
To put it more plainly, Harry did not know how to do something that merely broke ordinary rules, like using magic to enter dreams.
But summoning evil spirits-something that had never been written into law because everyone had tacitly agreed not to touch it long before that-was something Harry was exceptionally good at.
Qiu naturally expressed some concern about this, but only a little.
As someone who also possessed Ravenclaw's legacy, she knew just how skilled Harry now was at this sort of thing. The chances of anything going wrong were very, very small.
The only problem was that Hogwarts was now enveloped in an extremely powerful barrier. Summoning evil spirits here was no easy task, even when it was only a very low-ranking evil spirit like Zug.
It would require some sacrifices as offerings and certain special rituals.
Harry was not worried about the sacrifices. He could have Dobby obtain them for him.
Nor was he worried about ritual magic. He was very good at that now.
What troubled him somewhat was the lack of a place.
Ritual magic did not require a particularly large space, but it did require the use of that space for a considerable length of time. Even