So, those words were actually an ancient spell of binding.

"Just something about ancient spells, spells that would soon be yours."

"Not if there were some ancient spell holding the madness in check," Mentia said.

She tried other words from his ancient spells; none revealed the book.

Yet this is a very ancient copy of an even more ancient spell.

The Wyrd knows some ancient spells, and she's dangerous to know.

That impressed him: great virtue would surely fill such an ancient spell.

He had memorized an ancient spell for the calling up of the Devil and his confinement within a bottle.

"Was this what you meant, when you spoke of ancient spells?"

That was the nature of the ancient spell.