The mighty sea beast known as Physoulis is responsible for sinking countless ships in the past. Back in the days of piracy in the Nerida Region, Physoulis was said to attack pirate ships and drag them to the depths of the ocean where it lives. In doing so, it created a powerful enemy from the remains of the crews it attacked, which resulted in the Enigmon known as Brighast and Ghoulleon being formed. This feud continues even to this day, and Physoulis cannot help but to attack even regular old fishing boats due to their history of hating seafaring vessels.