Card Sagas Wars is a PC game currently being developed by Arhuon and Orkimedes. The game utilizes the MUGEN engine, but unlike other MUGEN games all of the sprites are made entirely by scratch. This not only gives the game a uniform and "professional" artstyle, but it also allows for better control of balance. Although the game is unfinished, many trailers and gameplay videos have been released. All of the info can be found here. The official website can be found here (it's entirely in Spanish, though), but is currently unable to receive updates.