iMtG Server: Gathering

This is my first attempt at a standard deck.  I was trying to go blue and white with a lot of flying and unblockable to try and sneak by my opponent while having a little defense.  I also wanted some of the blue control mixed in.

Any advice or tips would be greatly appreciated!!!

Uw 60 cards, 0 sideboard 9 {Plains} 10 {Island} 4 {Azorius Guildgate} 23 lands 3 {Phantom Warrior} 1 {Heliod, God of the Sun} 1 {Shipbreaker Kraken} 2 {Celestial Archon} 1 {Daxos of Meletis} 1 {Colossus of Akros} 1 {Thassa, God of the Sea} 1 {Simic Fluxmage} 1 {Deputy of Acquittals} 1 {Serra Angel} 2 {Burnished Hart} 1 {Ætherling} 4 {Seraph of the Sword} 4 {Wall of Frost} 1 {Medomai the Ageless} 25 creatures 1 {Spear of Heliod} 2 {Pacifism} 1 {Bident of Thassa} 2 {Riot Control} 2 {Cyclonic Rift} 4 {Render Silent} 12 other spells Sideboard