The Ryu Dragon (リュウドラゴン Ryū Doragon?) is a Dream Eater that appears in Kingdom Hearts 3D: Dream Drop Distance. Its Spirit version is obtained via Spirit synthesis, while its Nightmare version can be found in The World That Never Was and the Symphony of Sorcery.
Land and air are two separate play-grounds for this mythical monstrosity. But even a big, smart, fast contender like this can be put on ice (literally).