There was a legendary vampire sailor who was also a priest of the vampire goddess. He had managed to free himself from getting burned by the sun with a special blessing from the goddess and in order to return this favour done by the goddess he decided to visit the whole world and to spread her name all across the world.
His name was Spero and the stories of his adventure were very very among the vampire child. There was one of his stories that the general population did not know about and only veteran sailors knew about it. In this story there was an area, which their ship would also come across in this journey.
According to the story, Captain Spero had encountered a seven headed serpent here which was extremely poisonous and had several troublesome powers. For example it was capable of turning anyone into stone just from looking at that person or it was also able to mind control weaker monsters. This was truly a very troublesome enemy that was extremely hard to defeat.