GMAD is a project in the Casual forums of MTGnews.com designed around building a themed deck as a group to get multiple ideas all wrapped up into one!
GMAD I - U/G Aggro
GMAD II - W/B Control
GMAD III - Sligh
GMAD IV - Artifact Control
GMAD V - R/G Elfball
GMAD VI - R/W Pebbles
OK, This is the first time that an explanation might be necessary, because some of you might not know he term "Peebles". It refers to a deck that is build around the combo Enduring Renewal/Goblin Bombardement, together with 0-mana creatures.
GMAD VII - W/G Weenies
GMAD VIII - Turboland
Again, an explanation might be needed. Turboland is a combo deck around Exploration (or Fastbond) and Horn of Greed. Everyone who understand the concept of card advantage should now understand its power.
The deck kills with something else, though. It uses Battlefiled Scrouger to shuffle three Time Warps in your library all over again - and if you don't have cards in your library due to the drawing engine, then this means infinite turns for you....
GMAD IX - Mono-green Beatdown
GMAD X - Nefarious Lich
How does such a deck win, you might ask? Easy - the answer is once again card advantage! And Nefarious Lich in combination with Words of Worship allows this....
GMAD XI - Highlander Black Weenie
GMAD XII - Highlander Enchantress
GMAD XIII - NetherVoid
GMAD XIV - Five Color Domain
GMAD XV - Artifact Aggro
GMAD XVI - Artifact Mill
GMAD XVII - W/R Control
GMAD XVIII - U/B Control
GMAD XIX - Highlander Merfolk
GMAD XX - No Hand
This deck wants to abuse cards that help you when you have no cards in hand. Imaginary Pet is a very good example for such a card.