Island of the Dome of the Slate
During his studies at the School of Magic, Twinsen has to complete a test on the island. However, he cannot reach this island using the ferry services, and should therefore cure Dino-Fly first for him to take him there. By completing another test of the school, Twinsen receives the Horn of the Blue Triton, which he uses to cure the Dino-Fly. He can then use him to reach the island.
On the island, Twinsen enters a room where the floor beneath him is transparent, and only becomes visible within a few paces of his position. He has to track his way through the room, until he reaches the door opposite the entrance. Outside the dome is a map of the place, which Twinsen can use when getting stuck. When Twinsen reaches the exit, the Mentor of the School of Magic arrives, and gives Twinsen a magic slate.