A series of spells referred to a complete set of spells.
To put it simply, the Apprentice-level spells that Heath and the others were currently learning were all single spells that did not form a system. Once they were learned, there would be no room for improvement.
However, a series of spells was different.
Each series of spells was made up of many similar types of knowledge outlines, low-level spells, and combinations.
This pile of knowledge ultimately formed a complex spell model.
And this was also a Wizard-level spell.
Heath looked at Daniel as if he had seen a ghost. "Are you sure, Apprentice Daniel?"
If Apprentice-level spells were sold, so be it. These things were scattered knowledge points, and most of them had been spread out very early.
