Shingeki no Bahamut Genesis

is a Japanese anime television series produced by MAPPA that is based on the Rage of Bahamut mobile game. The series was directed by Keiichi Sato and written by Keiichi Hasegawa, featuring character designs by Naoyuki Onda and music by Yoshihiro Ike. The anime aired between October 6, 2014 and December 29, 2014 for 12 episodes, and has been licensed for streaming in North America by Funimation.

On May 6, 2015, a second season was announced at the series' orchestra concert event. Titled, it is scheduled to premiere on April 7, 2017. Amazon will exclusively stream the second season in the United States on their Anime Strike service.

A new anime entitled, was announced and based on the social game event. Unrelated to the series and now by Cygames Pictures, it was originally scheduled to premiere in April 2016, before being postponed and rescheduled for January 20, 2019.

Plot
Mistarcia is a magical world where humans, gods, and demons mingle together. In the past, the black-and-silver winged Bahamut had threatened to destroy the land, but humans, gods, and demons overcame their differences to fight together and sealed its power. The key to that seal was split in two, one half given to the gods and the other to demons, so that they would never be united and Bahamut never released. Now, two thousand years later, the world is in an era of peace - until the day a woman steals the gods' half of the key. The hunt begins to find the thief and maintain the seal while others conspire to find the key, so as to release the fearsome Bahamut.

Official

 * Shingeki no Bahamut Genesis Official site