I started playing magic about 8 months ago. I was quickly persueded to make a type I deck. I got some help but I am wondering what can help this deck be better. All suggestions are welcomed.

Land:  11
        1 Flooded Strand
        1 Tolarian Academy
        2 Island
        4 Polluted Delta
        1 Swamp
        2 Underground Sea
Artifact:  11
        1 Mana Vault
        1 Mana Crypt
        1 Lotus Petal
        1 Sol Ring
        1 Black Lotus
        1 Memory Jar
        1 Mox Ruby
        1 Mox Sapphire
        1 Mox Pearl
        1 Mox Jet
        1 Mox Emerald
Enchantments: 2
        1 Yawgmoth's Bargain
        1 Necropotence
Spells: 
        1 Timetwister
        1 Repeal
        1 Vampiric Tutor
        4 Brainstorm
        4 Tendrils of Agony
        1 Demonic Tutor
        1 Chain of Vapor
        1 Hurkyl's Recall
        1 Ancestral Recall
        1 Time Walk
        4 Duress
        1 Yawgmoth's Will
        1 Windfall
        1 Frantic Search
        1 Merchant Scroll
        4 Dark Ritual
        4 Cabal Ritual
        1 Rebuild
        1 Mystical Tutor
        2 Grim Tutor

Thrown together Sideboard is
4 Darkblast
1 Retract
1 Tinker
1 Darksteel Colossus
1 Chalice of the Void
4 Extract
2 Jester's Cap
1 Jester's Scepter

All help is appreciated: