Also, Asuna's "dispel magic" effect seems to only affect pure summons (seen mostly in the Kyoto arc) and whatever she's cutting with her BFS
at the time.
Also, sheer raw magic power can overwhelm it (as seen when Eva flash-freezes Asuna for scratching her), so it's possible she wouldn't negate the heavy
artillery at the drop of a hat, or at least not stuff like, say, Hayate's wide area freeze and other lower level but probably more precise equivalents
that're around.
---
"Oh, silver blade, forged in the depths of the beyond. Heed my summons and purge those who stand in my way. Lay
waste."
at the time.
Also, sheer raw magic power can overwhelm it (as seen when Eva flash-freezes Asuna for scratching her), so it's possible she wouldn't negate the heavy
artillery at the drop of a hat, or at least not stuff like, say, Hayate's wide area freeze and other lower level but probably more precise equivalents
that're around.
---
"Oh, silver blade, forged in the depths of the beyond. Heed my summons and purge those who stand in my way. Lay
waste."