Five Dragon Gods

The Five God Dragons (五神竜 Goshinryū) are a group of five tremendously powerful Dragons that inhabit the northern continent of Giltena, each stated to rival the might of Acnologia.

Overview
The Five God Dragons have existed since the year X633 at the latest, the same year that the first Mage Guild, Magia Dragon, was created. They gained the description of "gods" due to each dragon's insurmountable strength, which is rumored to equal that of Acnologia, one of the most powerful and feared beings in Earth Land. After Elefseria's effort to subdue them by learning Dragon Slayer Magic was met with failure, he requested powerful mages from other guilds to carry out the task of sealing them away. Prior to Team Natsu's acceptance of the job, 98 failed attempts have been made over the course of at least 160 years, with only Gildarts Clive managing to return from the mission alive after being maimed by Acnologia, which caused him to realize the hopelessness of defeating them.