(gentle music) <v ->"For his second challenge, Arthur was truly stumped. </v> He had heard of a huge library within the god's hall. Perhaps he could find something useful there. He searched for an entire day and night, but found nothing. It was only when reading the last book from the very last shelf that an ancient piece of parchment fell out. It was an old map of the Norse world. It showed the realms of the gods, the humans, and the giants. And connecting them all was a great tree. The huge mountainous World Tree, Arthur thought to himself. That was it, the World Tree was the mountain with roots. It looked much bigger in real life. But with no time to waste and legs as sturdy as two cooked noodles, Arthur began to climb." (gentle music).