Can someone tell me how to get good cards for yugioh wc 2008?

I need some help getting rare cards like obelisk and other good rare cards can somebody please tell me how i can get those.

Can someone tell me how to get good cards for yugioh wc 2008?
2008 doesn't trade with the old games


i've tried


besides they're banned


and even if you've finished the game and can use banned cards, whats the point???
Reply:trade it over from older games