Have you ever watched the show Yugi-oh ? There was a part in the show where those people place cards on the board and they come out to life on a bigger board. If you cannot imagine that its ok, here is a picture to show you:
this is how the board looks like:
The aim of the game is to stratigically occupy 5 spaces out of the 9 spaces on the board in order to win. To acheive that you have to use certain spells and monster cards to summon on the board and kill other monsters on the board to stop them from winning. To prevent easy wins from an overpowered deck, there is a function called summoning lock that prevents certain cards from being usable until the lock is taken off.
Another fun thing about this is (to me that is) that you have to buy cards to increase your deck size and the only way of getting better and powerful cards. So yes you have to spend more then just buying the game itself. If you want to win flawlessly you have to get booster packs to assemble a deck.
Graphics-wise, the monsters are quite nicely done.However I feel that they skimped on the spell animations. Whenever you cast a spell a hooded guy just appears and reads out the name of that spell and thats all. Kinda stupid I feel.