I recently acquired a Fluttershy card box and immediately thought that it would be great for an EDH deck. I came across my Trostani and figured she has the same love of creatures. I quickly made a Trostani life-gain/token deck. I'm a casual player and I rarely get the opportunity to play EDH. I don't have much experience, but I do love building the decks.
Test of Endurance and Felidar Sovereign would give you a couple of easy win conditions for how you're building. So would Celestial Convergence - just be prepared to draw an uncomfortable amount of hate from the table. If you're willing to shell out and go through the trouble to find one, Mirari's Wake makes your board presence ridiculous in all situations. If I were you, I'd drop a couple of the deck's lower-impact cards, like Prized Unicorn and Seraph of Dawn. I enjoy a Bant-colored EDH deck with a lot of life-gain effects, so I think this looks like a fun deck.
Thanks for the suggestions guys. Did a little digging and found out I had some of the cards mentioned. They are definitely improvements for the deck. (Totally forgot about Rune-Tail . . . wanted to use him when I got him so he got set aside, but I didn't play life-gain decks back then.)
1 Trostani, Selesnya's Voice
Creatures
(27)
1 Angel of Jubilation
1 Armada Wurm
1 Crusader of Odric
1 Emeria Angel
1 Emmara Tandris
1 Essence Warden
1 Exalted Angel
1 Geist-Honored Monk
1 Luminous Angel
1 Mycoloth
1 Nacatl War-Pride
1 Requiem Angel
1 Rhox Faithmender
1 Rune-Tail, Kitsune Ascendant
1 Seedborn Muse
1 Serra Ascendant
1 Serra Avatar
1 Sigarda, Host of Herons
1 Sigil Captain
1 Soul Warden
1 Trostani's Summoner
1 Twilight Drover
1 Vitu-Ghazi Guildmage
1 Voice of Resurgence
1 Wayfaring Temple
1 Windborn Muse
1 Worldspine Wurm
(14)
1 Aura Shards
1 Awakening Zone
1 Cathars' Crusade
1 Collective Blessing
1 Ghostly Prison
1 Growing Ranks
1 Intangible Virtue
1 Luminarch Ascension
1 Mirari's Wake
1 Martyr's Bond
1 Oblivion Ring
1 Privileged Position
1 Squirrel Nest
1 True Conviction
Sorceries
(8)
1 Alive and Well
1 Bestial Menace
1 Call of the Conclave
1 Calming Verse
1 Nomads' Assembly
1 Overrun
1 Storm Herd
1 Three Dreams
Instants
(12)
1 Advent of the Wurm
1 Druid's Deliverance
1 Ethereal Haze
1 Fog
1 Naturalize
1 Path to Exile
1 Reclaim
1 Rootborn Defenses
1 Selesnya Charm
1 Sundering Growth
1 Swords to Plowshares
1 White Sun's Zenith
(3)
1 Behemoth Sledge
1 Lightning Greaves
1 Moonsilver Spear
Planeswalkers
(1)
1 Elspeth Tirel
Lands
(34)
1 Command Tower
15 Forest
1 Gavony Township
14 Plains
1 Selesnya Guildgate
1 Sunpetal Grove
1 Temple Garden
Removed Prized Unicorn, Seraph of Dawn and Asceticism
Added Privilaged Position, Mirari's Wake and Rune-Tail
Trostani as Fluttershy
Alters for sale
I would also swap out Emmara Tandris for either Avacyn, Angel of Hope or Rune-Tail, Kitsune Ascendant.
Krosan Grip is more useful than Naturalize in EDH where the extra 1 mana won't be a problem.
Those are the immediate things I can think of.
WUBruna, Light of AlabasterWU
BChainer, Dementia MasterB
Trostani as Fluttershy
Alters for sale