[As usual: My decks are for multiplayer, mostly 2vs2 and Pentagram. I am playing in a regular group of Magic veterans with huge collections, the meta is very mixed and mostly relaxed but sophisticated, no netdecks. No need to comment on manabase because it is always subject to change due to availability of my duals and fetchies, but feel free to suggest non-basics with abilities that fit. We don't use sideboards, cards listed in the sideboard are cards I consider adding and/or cards I don't own yet]
So, this is straight forward:
Gain massive amounts of life with Ravenous Baloth and Fangren Marauder. Then win the game with Hurricanes. Sounds stupid? If it works, it ain't stupid ... see, there are lots of beast token generators and Thran Forge help you to send more artifacts to the grave. All your stuff doesn't fly, so Hurricane is usefuel if not needed on itself, but in the endgame it will be a potent finisher.
See a detailed rundown of all cards and interaction in the How to Play section.
Oh, this is designed for multiplayer.
It looks finished but I am not fully satisfied yet:
* I decided to make red the splash colour since I need red mana for those Contested Cliffs anyway. I added Brass's Bounty as a setup for a big play. It virtually doubles my mana for a big Hurricane next turn but also gives me access to lots of ARTIFACTS. If I have ten lands out along Fangren Mauler and play a Bounty, then that's up to 50 life I give me at any time! Second addition is an Overmaster that helps me punch through my key spells like Brass's Bounty, Ezuri's Predation or that Hurricane.
But I haven't taken anything out yet ... so, I still need suggestions on what to cut.
Of course I could afford to play with slightly more than 60 cards. It's 62 currently. If I don't cut anything I would have to add another land, probably a Strip Mine.
* The entire thing seems to be too slow but I can't find a way to speed this up. Beast tokens tend to be 3/3 and bigger and cost accordingly. I do NOT own any Gaea's Cradles!
*
* RAVENOUS BALOTH
4 life per beast at any time! And he is a beast itself - yes, you can sacrifice him to himself, notably in response to something that would exile it.
* FANGREN MARAUDER
5 life for every artifact that goes to the grave ANYWHERE ... now that's massive! There are tricks to speed that up, see below. Nice bonus: the Marauder happens to be a beast itself :)
* THRAN FORGE
This is the main way to gain more life out of the Marauder. Note that it can be used on opponent's creaturs, too! So, whenever a creature ist about to die, give it the full phyrexian treatment and harvest 5 life. Of course it can still be used to pump your critters.
* TIRELESS TRACKER, ROOT OUT, WEIRDING WOOD
These provide me with some utility and carddraw in the form of clue tokens which happen to be arifacts that are designed to die - feed the Marauder! The Weirding Wood might go if I don't find a worthy second colour splash.
* KEEPER OF THE BEASTS and PULSE OF THE TANGLE
Compareably cheap beast token generators. The only work when someone has more creatures, though, but with Ravenous Baloths you can control the size of your population.
* HURRICANE, CYCLONE
Your game finisher and only creature removal. By the time you cast you you hopefully have more life than anybody else, so max it out.
* EVOLUTION CHARM
The thing with the Baloths and Marauders is: They are key to this deck and you need them out as soon as you have the first material out that might die. So they will be in constant danger of getting nixed. Evolution Charm can bring one of them back to your hand. But it can also fetch a basic land in a pinch (or to get the splash colour if I can decide on one) and it has a thid option that will get you rid of a non-flyer when it is Hurricane-time.
* GARRUK WILDSPEAKER
One attempt to make this a bit faster. First ability has synergy with Weirding Wood, second produces beasts, third is an Overrun so maaaybe I could also score a refular victory. I should have a second Garruk in here but I own just one.
* WOODRIPPER
This is fantastic. You can use it's fading counters right away to kill artifacts, with an Marauder out thats 15 life if you have enough targets. And if you don't you could make some with Thran Forge. 4/6 for 5 isn't bad either. It's fading, so it doesn't die immediatedly when there is not counter, it will die next upkeep when you are required to remove a counter but can't. And IF it dies ... it's a beast! :)
You just have to love that.
* THRAGTUSK, RAPAGING BALOTHS
More beast generators that re beast themeselves. Should maybe pack more of them but I ran out of deck space and don't own more than one Baloth.
* PRIMEVAL BOUNTY, MIDSUMMER REVEL, FRESH MEAT, EZURI'S PREDATION
More or less random beast generators. Like with some other one-ofs I'll run them for a while and see what works best. Although it's unlikey that I will change this too much: Fresh Meat has great potential, but if you have no mana left when someone wipes the board, you'd better be off with one of the others. Primeval Bounty looks also great because you get something whenever your play a card. However, it can be disenchanted. Midsummer Revel could be disenchanted as well but you can use it in response. It takes some time to be good but no additional resources. The Predation is the most expensive but also the most explosive and has immediate impact on the board. Honestly, the deck is better off with one copy each.