The Baten Kaitos series takes place in a world where humanity lives on a series of island-nations in the sky. These islands are the last livable remnants of a poisoned Earth that was devastated a thousand years ago in the War of The Gods. The residents of the sky however are prosperous having been aided by various advantages, including Wings of the Heart- the manifestation of the human spirit in the form of usable wings-, Magic, Magnus- a technology that allows the essence of an item to be stored within small card-like objects-, and Machina- mechanical technology. Their way of life however is in danger as the ancient Gods power begin to return and threaten the world.
Found in both games of the series are vividly painted pre-rendered backgrounds, card based "magnus" battle systems, and plot twists regarding the nature of the antagonists.