Craving a card game

So being the drug-dealers they are, Wizards of the Coast handed out free 30-card Magic: The Gathering ("MtG") decks at PAX as part of the "Swag bag" everyone could pick up on the way in. Being a former pokemon player and someone who is obsessed with collecting things like that, I took one...and through some trading and such, got 2 others (with the 4th on the way). Alas I did not seem to find a Green deck but I digress. Going through them has stirred within my feelings I've not felt since high school and a desire to get into some sort of CCG again. Admittedly a drug habit would be cheaper, but I'm sticking to the realm of "legal in most states" for now.