A few thoughts. If you are tossing a blue deck you probably were running control? If so I think you'll miss the counterspells. I would add them back. I don't like Collective Restraint It costs one more than propaganda or ghostly prison to potentially be less effective. I would consider Sphere of Safety instead. Also not a huge fan of Hive Mind unless run in a chaos deck or with Pacts. Rather than Oath of Lieges consider Land Tax. How do you really plan to win by the way? Just through Kozilek beatdown? I think you should add either more or more reliable ways. Also I don't know how your playgroup is but I think people I play with would be bothered by Divine Intervention Finally have you considered Omniscience? Great Rector target and wins the game with Enter the Infinite. If you're looking for more ideas I have a list in my sig with a couple explanations
Also please disregard the land base it is not exactly that but I not gathered them all just yet.
1 Hanna, Ship's Navigator
1 Aura of Silence
1 Collective Restraint
1 Copy Enchantment
1 Detention Sphere
1 Divine Intervention
1 Dream Halls
1 Ghostly Prison
1 Greater Auramancy
1 Hive Mind
1 Humility
1 Indestructibility
1 Karmic Justice
1 Mind Over Matter
1 Oath of Lieges
1 Oblivion Ring
1 Opalescence
1 Planar Collapse
1 Propaganda
1 Arenson's Aura
1 Rhystic Study
1 Martyr's Bond
1 Solitary Confinement
1 Sphere of Safety
1 Teferi's Care
1 Enduring Ideal
1 Enter the Infinite
1 Idyllic Tutor
1 Open the Vaults
1 Replenish
1 Supreme Verdict
1 Wrath of God
Land (36)
18 Island
18 Plains
1 Azorius Signet
1 Crystal Chimes
1 Fellwar Stone
1 Font of Mythos
1 Forcefield
1 Gilded Lotus
1 Howling Mine
1 Mana Vault
1 Mind Stone
1 Otherworld Atlas
1 Sensei's Divining Top
1 Sol Ring
1 Talisman of Progress
1 Temple Bell
1 Thran Dynamo
1 Skull of Orm
1 Auramancer
1 Fountain Watch
1 Grand Abolisher
1 Kozilek, Butcher of Truth
1 Lost Auramancers
1 Monk Idealist
1 Phyrexian Metamorph
1 Sun Titan
1 Windborn Muse
1 Enlightened Tutor
1 Long-Term Plans
1 Mystical Tutor
1 Path to Exile
1 Swords to Plowshares
Cards I am currently considering adding
Aura Thief
Enchanted Evening
EDH Deck
URGThe Group HugsWUG
Sovereigns of lost Alara?
Eldrazi conscription?
Angelic Destiny?
Slow Motion?
I have wanted to make this deck but only if Hanna comes out with Terese Neilsen art.
Some Hexproof stuff would be good as well.
And maybe Tormod's Crypt (some graveyard hate)
Both fetchable with Trinket Mage ^^
Neheb
Marath
Yidris
Sharuum
Yidris