The Baten Kaitos series told a story of a world in the sky filled with people with wings that all sort of talk like they were speaking through cardboard tubes. Aside from the sky whales, weird pseudo philosophical magic system, and absolutely beautiful settings, Baten Kaitos was known for its peculiar card based battle and inventory system. Everything you can do, from items to attacks to equipment, is shuffled into a deck in order to be used in combat (although cards themselves can change during combat as well). For example, milk, when not used, can spoil, and eggs, when not used, can become chickens. Just like in real life!