In a nutshell, this is a Mono Green Beast Deck, built Tournament Style to get already GIANT creatures out ASAP, and to BEEF them up on top of it.
Hence the "Bigger, Faster, Stronger"
Nothing in this deck costs more than 4 mana except Garruk and now my Bellowing Tanglewurm so fourth turn I should be able to get anything I want out.
Green Sun Zenith is my creature draw engine. My main beasties are my Primordial Hydras and Dungrove Elders and I can get them out with a GSZ and 4 mana.
Mostly everything else in the deck is based on beefing these already sizable creatures up and keeping them on the board, even if they self grow.
*Notes: The sideboard originally had an additional 2x Asceticism instead of x2 Wurm's Tooth. The deck already has 2x Asceticism for tournaments, but since it's more important to kill your opponent asap, I didn't find it a good idea to potentially have 4 total from mainboard and sideboard because they are expensive mana wise to get out. The game shouldn't be prolonged.
**Notes: It originally featured 2x Thrun, the Last Troll instead of 2x Bellowing Tanglewurm. But Thrun is a rather expensive card in an already moderately expensive deck. The substitution seems to have worked well so far in Playtesting.
***Notes: This deck should defeat your opponent by the 8th turn, in some cases by the 10th turn but no later than that. Not the fastest deck in the world, but pretty damn fast for a Mono-Green Beast Deck.
****Notes: You should never risk and opening hand with less than 2 mana. At least with 2 mana you can churn out those Garruk's Companions.