Wave-Motion Cannon.
I used to go to local tournaments and own people with an extremely outdated burn deck. The premise was to field lock with LLAB and Gravity Bind, and fire off uber Wave-Motions and flip Stealth Birds.
Threatening monster, you say? Rar, Lava Golem. om nom nom.
Then the metagame got so ridiculously fast and broken that I gave up because there was no fun left in it. It was "PLAY THIS, NOW I CAN PLAY THIS, SUMMON THIS, DESTROY 2 CARDS, SPECIAL SUMMON THIS, GFG NUB AHAHAHAHA YOU SUCK".
Now I've moved on to Magic. Thank God you can at least run something other than T1 expensive crap and not get your ass handed to you on a silver platter. >_>