Overworld: The generation of heroes Volume 1

After his father's tragic and mysterious passing, Oliver discovers a magical box he kept of talisman jewels containing spirit-like creatures called Airidans, which grant people to become superheroes of animals or mythical creatures, and these Airidans tell him he is the new guardian after his father. As his cousins arrive from America to mourn the loss, his cousin Darla finds the box and steals one of the hidden jewels; A blue pearl attached to a necklace, and becomes a villain named Mooroopna and causes havoc over the city. With this, Oliver befriends Airidan Dragazard and becomes Bahamut, the dragon superhero, and gives his friends some Talisman jewels, forming an army to battle Moonroopna...