This is a pretty simple and straightforward build with about ~35 fatties, ~35 land and 30 mana-fix/ramp and utility/big spells.
The deck basically just ramps mana to 5 or 6 and starts using Mayael as much as possible. The first few times she gets wacked, you have enough mana to recast her from the command-zone. Beyond 7 or 8 mana, you have enough to just hardcast about everything to get a big threat every (one of your) turn.
Best plays:Turn 2 Bloom Tender, turn 3 Mayael, turn 4 start using Mayael.
Some notable cards:Awakening / Seedborn Muse:These allow a Mayael on every one of your opponent's turns as well, which quickly gets out of hand.
Heartbeat of Springs, Zhur-Taa Ancient, Genesis Wave
2013-08-23 Update:Updated to my latest build. The sideboard contains other options / cards I pulled from the original build.

Sideboard:
Sideboard (33)
1x Ajani Goldmane
1x Arashi, the Sky Asunder
1x Avacyn, Angel of Hope
1x Avenger of Zendikar
1x Bogardan Hellkite
1x Boros Guildgate
1x Disaster Radius
1x Dragonlair Spider
1x Drumhunter
1x Elderscale Wurm
1x Engulfing Slagwurm
1x Garruk Wildspeaker
1x Garruk's Packleader
1x Gemstone Mine
1x Glaring Spotlight
1x Gruul Guildgate
1x Gruul Ragebeast
1x Gurzigost
1x Inferno Titan
1x Knotvine Mystic
1x Momentous Fall
1x Nantuko Monastery
1x Oblivion Ring
1x Qasali Pridemage
1x Razia, Boros Archangel
1x Requiem Angel
1x Selesnya Guildgate
1x Shivan Hellkite
1x Somberwald Sage
1x Temporal Aperture
1x Tyrant of Discord
1x Vivid Grove
1x Vorinclex, Voice of Hunger
General