"As you wish, then. Anybody you see in the hallways wearing something on their head is probably wearing a headband that enhances some aspect of their mentation. It's not that only artifacts can do that, it's that this one is more powerful and enhances more aspects of my mentation simultaneously. Before taking it off, I cast three spells on myself that only last minutes, but in combination can do two-thirds of what my artifact does in three of the most important regards, which is why I didn't fall over after taking it off."
"Once Cheliax was sure that you weren't the sort to try to destroy Cheliax or Golarion, they'd have probably given you one of the more relatively powerful headbands short of the artifact level, which enhanced whichever single aspect of mentation you most needed as powerfully as this headgear enhances three of mine, and spellcasters could have temporarily enhanced other aspects. That's what they would have done for you, if not for the antimagic field, if any of that had worked for you."
"That's all the sad news that was coming immediately to mind. Would you like more sad news like that if it came up in the future?"