Here's a couple of card suggestions:

More Detention Sphere 's or Oblivion Ring 's to deal with Planeswalkers, etc.

Also Staff of Nin , Fathom Mage , Simic Charm , and Thalia, Guardian of Thraben would all fit really well into your deck and provide some much needed card advantage, protection, and non-creature spell hate.

This deck used to have Roaring Primadox which gave the detain creatures the ability to repeat every turn. At least one, probably two, should still be here! Fathom Mage is a fun card but your weenie creatures aren't going to evolve it much. Elvish Visionary could provide card draw if the cantrips aren't enough.

Thanks for the advice. My friends and I don't really have planeswalkers, so I often don't consider them when I build a deck. However, that will not be the case in more competitive play. I've added two of my Oblivion Ring 's. Sadly, Thalia, Guardian of Thraben is a little out of my price range. Staff of Nin looks a little pricy on mana. I will test it out.

Roaring Primadox was fun! I can't remember why I took him out. Fathom Mage might proc a few times, but I don't think I'd get much millage out of it. I had Elvish Visionary in but took it out because it did not trigger Quirion Dryad . Maybe if I don't put to many in it will work (DrFmeat is right, I need more card advantage).

Thanks for the help! I'm always looking for more improvements.

Give Fathom Mage a shot...! With your current composition, you're nearly guaranteed 2 extra cards and a 3/3 on the board ...not shabby. If you start running multiples of Roaring Primadox as well, you're getting up into 3 cards (and a 4/4) for 1 territory which is super money.

Have you considered Ghostly Flicker ?

Good synergy especially with Fathom Mage and Azorius Arrester for detain/draw.

Might not warrant a card slot though unless the synergy extends to most of your creatures (which it might!).

This deck used to run Ghostly Flicker and Cloudshift . I decided switch them out for Peel from Reality , because the flicker spells scale better with large creatures with huge enter-the-battlefield effects. Maybe I could run both...

How did you add those pictures of the cards to the description, btw???

The syntax is described in this webpage tappedout has posted everywhere. It is pretty well explained, but let me know if you have any trouble!

Thanks again for your suggestions for the deck. I've had a lot of fun with it!