As far as magical incantations went, it didn't make much sense. He'd sooner expect the ground to open up than launch a barrier, but then he was never given to poetry. It didn't matter much anyway, as it worked and he had a chance to grin as the two students in front ran headlong into the barrier. The other two had just enough sense to stop before they injured themselves as well.

As Isabel predicted, they did begin to edge around, feeling out the barrier's limits as they went. This time, when one of their wands shot a bolt of energy, he was ready for it.

"Reflect!" Thaumaturgy didn't account for having a sword in one's hand, but the gesture seemed to be sufficient enough, anyway. The spell backfired, and it's would-be caster suddenly became violently ill.

Eleven grimaced, then turned his eyes to the fourth. "..Are the other two getting back up?"