Just some cards that seem to be good in this style of deck that aren't super expensive:

Attrition

Night Soil (combos well with From Beyond so you always have targets)

Languish could be good in your deck, and your deck seems to have a number of ways to get your creatures just out of it's range.

Green Sun's Zenith especially if you can get a Dryad Arbor

TheInnsanity Thanks for the suggestions.

Not sure if Smothering Abomination makes the cut. Always seems to be the last card I want to cast. Thinking that Turntimber Basilisk would be better in the spot.

Vizier of the Menagerie is probably better in the 4 spot.

Cryptolith Rite and Mindslicer are on their way. Need to figure out what needs to be removed. Maybe one of the weaker tutors or Hell's Caretaker.