Letter From My Father - S1.E21

The gang reach the forest where they can see the remains of the World Tree. They decide to go there. Nina flies ahead, but the rest have to go through a tricky swamp. Barrow, Gallus and Anji get stuck in quicksand and Al goes in search of Nina to get help. Ariba and the Zakums arrive and attack them. Meanwhile, Nina and Puudou are lost. But they are found by lots of Junior Yetis who take them to the Yeti. Al gets struck by a tree and drowns, and starts dreaming of when he was a baby, when his mom and dad clothed him and when Zaktuman attacked and Grande blocked the attack and fell. He also sees the Yeti save him and Grande tells him that he is fine and Al should wait for him. Yeti also saves him. Al returns with Nina to his friends to save them from the swamp and from Ariba with help from Yeti and his friends. Yeti then shows them the path out of the swamp, and gives Al his father's handkerchief that he saw in his dream.