Still need to make a sideboard for it, but so far this deck has worked beautifully. Early game, it is important to get some mana ramp going. My preference is to turn 1 put out Birds of Paradise and turn 2 drop Awakening Zone. If all goes well you should be able to drop Doubling Season on turn 3 which puts you at an extreme advantage. You have options at this point and any of them are good. Dropping Dragon Broodmother gives you plenty of flyers which get big fast depending on how you utilize devour. Mycoloth is another great one. Just make sure you have some creatures to devour before dropping him. Remember that his devour gets out of control. Every 1 creature you sacrifice will put 2 counters on him doubled from Doubling Season which puts it at 4. Then your next upkeep you will get not 4 but 8 tokens because they are doubled again from Doubling Season.
There are plenty of back up contingencies. Having troubles getting enough mana, throw out Xenagos, the Reveler and use his mana ability. Scared of getting pinged early game, use Hordeling Outburst to get some chump blockers or throw Essence Warden in to regain some of the health you are losing. As long as you stay alive early game and have Essence Warden out, you will regain more life than they can dish out late game.
Another alternate win, if you have Doubling Season out, both Garruk, Primal Hunter and Xenagos, the Reveler can be played and use their ultimate immediately. With Garruk, Primal Hunter this means a bunch of 6/6 wurms and with Xenagos, the Reveler this will put cards from your library straight onto the battlefield. There is a little risk that you wont draw into anything useful, but more often than not, I draw into something that gives me control over the battlefield.
Fervor is a great late game card. Many of the big time players are great cards on their own, but being able to throw Krenko, Mob Boss out and double the amount of goblins you have immediately is hard to keep up with. Or having it on the field before playing Mycoloth can be devastating. All the sudden having a huge monster swinging can put the pressure on even the best of MTG players. Especially when they know that this thing is just going to pump out even more tokens for them to deal with.
I'm still going to tweak this deck some, but for time being this has suited me well.
A small warning though. It isn't a bad idea to have a calculator handy when playing, and if you are playing MTGO... It has been known to overload the system a little.
