O.k so i've been working on this deck for only a few weeks and in the long run, it does well. Heres what its got:

Land:
21 Swamps
4 Rakdos Carnariums

Creatures:
4 Gobhobbler Rats
4 Razortooth Rats
2 Dimir Guildmages (used for some cheap power and discard, but they can go)
2 Hellhole Rats
1 Ravenous Rats
1 Ratcatcher
2 Stinkweed Imp (Would like to keep)
2 Enemy of the Guildpact
1 Carrion Wall
1 Gravedigger
1 Slithering Shade
1 Looming Shade
1 Drekavac
2 Dimir House Guard
1 Jagged Poppet (He can go if needed)
1 Crypt Champion
1 Mausoleum Turnkey

Sorceries:
1 Vigor Mortis (definitely can go if needed)
1 Wits End
1 Hex
3 Macabre Waltz
2 Mind Rot
2 Delirium Skeins
1 Cry of Contrition
1 Bond of Agony

Enchantments:
3 Seal of Doom
1 Nettling Curse

Instants:
3 Disembowel
1 Hit/Run (Hit is used, but can go if needed)
1 Souless Revival (Has to come out to be legal right?)
1 Last Gasp

I recently aquired these cards in an excellent trade (For ME) but have not done anything with them yet
but i know they might help:
1 Skeletal Vampire
1 Living end
1 Mindstab
1 Urborg Syphon-Mage
1 Call to the Netherworld
1 Tendrils of Corruption

Thought about Vexing Arcanix for a little bit of extra fun and damage, but not sure about it.

So, as you can see i have rats, and i have ratcatcher, but don't want to have a Rakdos or completely Rat based type of Deck. All of the new cards i think will go really go well in my deck, but speed is becoming a problem as i know that black is not usualy fast, but Doesn't have to be molasses slow. I also think i need maybe some more enchantments and instants, but not sure of what to put in there. I like making my opponent discard so i want more Hellhole and Ravenous Rats. Crypt mage is weird though. I bring mine back, but they bring there's so i'm not sure if i want to keep him. I think i have enough creature control, but not sure there also.

So there it is, I hope you get the chance to let me know how to fix my deck, and i appreciate your taking to time to read my e-mail anyways

Nick (C.O.P Noob)

Thanks for the E-mail, Nick!  I'll be glad to help you organize this deck into a ruthless example of the power of black magic.  The first thing I want to do is take a long hard look at your Rakdos cards here.  You've got ten cards here that need red mana (eight if you don't count Nettling Curse or Crypt Champion) and only four ways to produce red mana.  Also, quite a few of the red cards here you yourself admitted that you don't need.  So, I think it's probably a good idea if you cut Red altogether and aim for a strict black deck.  Yes, Hellhole Rats is a lot of fun, but by including it you run a large risk of having it stuck in your hand and unable to be played.  Decks of only one color are so much easier to play, so let's just try for a pure Black deck.  This means we have to cut Hellhole Rats, Gobhobbler Rats, Jagged Poppet, Hit//Run, Nettling Curse, and Crypt Champion.  I know the Champion could stay, but if there's no chance of getting the 2/2 double striker, what good is paying 3B for a symmetrical Raise Dead effect?  And Nettling Curse with no red mana is sub-par, so let's drop that too.