Your point 2 is another thing I’m getting pretty suspicious of. Quirrell has set up a very long plan, and could easily have faked this effect with wandless magic, or an enchantment he could later dispel, all along.
The sense of doom. I thought the magic-can’t-interact was mostly just the strongest edge of that—e.g. (maybe “i.e.” too) their magic could interact but it would hurt them enough that they don’t try.
Your point 2 is another thing I’m getting pretty suspicious of. Quirrell has set up a very long plan, and could easily have faked this effect with wandless magic, or an enchantment he could later dispel, all along.
I find it highly unlikely that he faked the Avada Kedavra/Patronus effect in Azkaban…
That could just be a feature of the True Patronus, which is pretty anti-death and especially anti-indifference-to-other-people’s-lives.
But that’s the first time Potter sees their magic interact, so what effect did Quirrell fake?
The sense of doom. I thought the magic-can’t-interact was mostly just the strongest edge of that—e.g. (maybe “i.e.” too) their magic could interact but it would hurt them enough that they don’t try.