Seems pretty clear that Ernie would invoke the weapon's Glory only in a situation that calls for him to meet an enemy head to head, with the rest of the party providing backup while Ernie essentially fights as a Paladin would.
This is true. And didn't Ernie just drop some deadweight fighter levels? So this is a nice replacement to allow him to keep up the momentum.
My comment was more on my perceptions. Ernie has never been that kind of a character, never (as I recall) used a destruction or a disintegrate. Ernie is a darn awesome halfling who just so happens to occasionally be called upon to do his righteous duty. I can respect that. I just know that any effect that says "no more casting" freaks me out, but I am eternally a wizard.
Come to think of it, wasn't Ernie being a Wilburforce sort of a big thing? I got the impression that would be addressed at one point, at least like exposition. But I do not recall anything else about it. Am I misremembering? I'd reread the story hour but I've got some work paperwork to do and I know I won't If I start up again.
Love this story though. So much.