Oh. Oops. Anna gave the professor a rather apologetic look, then stuffed the Algiz rune back into her rune bag. She'd definitely misunderstood the professor on that one. She'd thought they were to use any method they saw fit, not necessarily Isa. Ahh, well. Now that she understood, though, she really needed to refocus her concentration on the steadily rising water. At least she'd managed to cast a successful Impervius Charm during her first try, so she was managing to remain waterproof despite the water's depth.

Even though she probably should be nearly panicked, she still felt strangely cheerful. With a small smile on her face, she shook her rune bag, then drew Isa from it. As she did this, she called on Heimdall and Skadi, the God and Goddess she'd heard Professor Lupa instruct someone else to call upon. "Isa isa isa, i i i i i i i i i, i i i i i i s s s s s s, s s s s s s i i i i i i, i i i i i i i i i," she chanted, her rune held tightly in her right hand. A sudden thought then occured to her. What on Earth happened if they ended up freezing the water while they were still in it? Did the Impervius Charm assist them with that, too? If not, maybe they were meant to find a solution to that problem, as well.