Blue half deck from the 2013 Deck Builder's Toolkit

I pulled some nice Blue cards out of the toolkit, especially one Invisible Stalker, which has Hexproof, and a Misthollow Griffin, a Mythic Rare that can be played after it is exiled.

Of the uncommon creatures not from the packs I will pick two:

Niblis of the Breath-DKA-U: Tap or untap target creature.

Relentless Skaabs-DKA-U: Undying.

Eight more creatures to go (I picked seven good ones): 

Two of Deranged Assistant-ISD-C (one from the booster pack): Add 1 to mana pool.

Two of Stormbound Geist-DKA-C (one from the booster pack): Undying.

Scroll Thief-M13-C: Whenever Scroll Thief deals combat to a player, draw a card.

Archaeomancer-M13-C: When Archaeomancer enters the battlefield, return target instant or sorcery card from your graveyard to your hand.

Mist Raven-AVR-C: When Mist Raven enters the battlefield, return target creature to its owner's hand.

Now for the Sorceries, Instants and Enchantments (six goods ones, to get to twelve I would have to add some less useful cards from the packs):

Divination-Sorcery-M13-C: Draw two cards.

Talrand's Invocation-Sorcery-M13-C: Put two 2/2 tokens onto the battlefield.

Thought Scour-Instant-DKA-C: Draw a card.

Negate-Instant-M13-C: Counter target non-creature spell.  

Essence Scatter-Instant-M13-C: Counter target creature spell.

Encrust-Enchantment Aura-M13-C: Enchant artifact or creature. Enchanted permanent doesn't untap during its controller's untap step and its activated abilities can't be activated.