Rakdos edh

You have one too many cards! >:D

Anyyyway!

Rakdos, Lord of Riots is a neat commander, even though he is a liiiittle trickier to cast than some other commanders, his ability to reduce the cost of other creatures (as long as you can keep hitting opponents) is very valuable.

Looking at your deck, you have a good grasp of what creatures you want. Creatures with evasion types, such as flying, which you have a lot of, or things like intimidate, fear, shadow, etc. can be extremely useful. Your deck is also very powerful in terms of building up mana and reducing the cost of your creatures, but I see one /big/ issue you will have.

You have almost no way to ensure that you have creatures to play, and will likely have a very slow deck. One thing you will want to look for are cards that can help you draw more cards. One of my favorites for EDH is Planar Portal. It can help you search out one card each turn for six uncolored mana. It's a bit spendy to use early on, but hopefully you'll have plenty of mana to dump into it.

You'll maybe want to consider some other tutors, like Increasing Ambition, Demonic Tutor, etc. as they can help you get creatures or other cards you want early on. You might also consider putting an Eye of Ugin into your lands, as it can help you search out uncolored cards and reduces the cost of Eldrazi spells since you have a good number of those.

Overall, this is a good start to a reliable and solid EDH deck!

I have a couple decks you could look at for some examples of how to balance out manabases and tutors and the like. Take a peek if you want.

http://www.mtgvault.com/fairemont/decks/edh-insert-witty-title/

or

http://www.mtgvault.com/fairemont/decks/edhshadowborn-apostle/

Best of luck!

I'll try to help you some more, too! :3