User blog comment:EvanDude345rv5/Fairy Tail 333 Review : Ultear FTW !/@comment-5580383-20130604054518/@comment-7418318-20130604074042

Do you remember the Kakashi vs. Naruto and Sakura "evaluation fight" after the timeskip? There Sakura tore up a similarly big area of ground without breaking a sweat either. And that was even before the Sasori fight.

So you think that Kagura cut things with an unsheathed sword by brute strength alone rather than with magic? Remember that Ophiuchus was cleanly cut apart, which just doesn't work with a blunt object, unless there is some magic involved.

As for the two-handed attack, yes it was blocked by Erza, but the attack that did create a shockwave was also blocked by Erza. I don't see why the seconds block would suddenly supress a shockwave when the first one didn't, especially if the second attack is even stronger than the first.

I guess it's possible that the shockwave didn't come from the slash itself, but was a release of magical energy that was stored up in all the time the sword was kept in the sheath or something like that, or that Kagura lost her focus after her supposedly invincible strike was blocked... but I wouldn't like either of those explenations.