There were about a million sixth years in the world, or it seemed that way, and Mo felt pretty confident that they'd be able to take out their wall in no time flat. Or at least in the next two hours flat. He approached the wall at an angle, looking for any particular spots of interest. A crack, a chip, a dent, a rough spot... anything, really.
And since he couldn't touch the wall without getting zapped, it looked like eyeballing it was the only way to go. Mo leaned in, noting a particularly smoothed out area... sure. Why not give that spot a try?
Erm... "
SpeRevelio." Anything? Did it work? Where were his classmates?
The runes appeared on the wall, subtly and blending with the backgorund.