This game has a crazy passionate community still today, nearly 20 years past the release date in North America. After two decades, I still have yet to see another game made like it.
It is a 3D, third-person, real-time, Arena fighter, where your 'moves' or 'skills' are determined by a pre-built deck of cards. You interact with this deck in while on the battlefield, 'drawing' cards from your deck occurs by walking to a physical starting location, where your skills spawn as glowing floating orbs of dust.
If you are at all interested in card games, arena fighting games, DBZ-style combat, or old and unique games in general, it's a must play.