Aura focused decks aim to play enchant creature spells, and will often have extensive means to protect them. Hydra’s Growth is the card that started the train, but there is a lot to do with the deck around it..

Ian Ide
Finalist Leaderboard 5
WG Auras

Main deck (60)
Blossoming Sands
Selesnya Guildgate
11 Plains
Healer’s Hawk
Alseid of Life’s Bounty
Pious Wayfarer
Transcendent Envoy
Shepherd of the Flock
Barkhide Troll
Bronzehide Lion
Heliod’s Pilgrim
Setessan Champion
Heliod, Sun-Crowned
Karametra’s Blessing
Sentinel’s Eyes
All that Glitters
Angelic Gift
Warbriar’s Blessing
Season of Growth
Setessan Training
Hydra’s Growth
Dreadful Apathy
Gideon Blackblade
Sideboard (15)
Warbriar Blessing
Healer’s Hawk
Omen of the Sun
Return to Nature
Setessan Training
Revoke Existence
Nexus Wardens
Dreadful Apathy