In the crystal cave, Aristarch wakes up from someone rummaging through one of his pockets. After a bit of fumbling, he pulls out a slimy and slippery little thief.
It turns out to be a small biter, about the size of a hand, who has already managed to eat a letter from Zai. What will the inexperienced student do with this small but already biting intruder who disturbed his sleep?