“And spell formulas are the exact same thing, only with more pronounced benefits and drawbacks,” said Nora. “Since mages can take their time when crafting the spell formula, they limit the mana flow much more tightly than your typical invocation. This results in much greater potential benefits, but also makes the spell even more inflexible. And, of course, a tighter spell boundary leaves a smaller margin for error, so designing a working spell formula is a lot harder than designing a working invocation.” Zorian waited patiently until she was finished, not really sure why she was telling him these things—this was all basic theory that he had heard and read a thousand times—but unwilling to interrupt. Unfortunately, it appeared he would have to wait to hear what her point might be. She sud

