The best way to ramp up to big eldrazi's is to use the Urza Tron land. I dont know what kind of budget you are on but for the best land base for big eldrazi you need 4x Urza's Mine 4x Urza's Power Plant and 4x Urza's Tower and then a few other lands based on what colored spells you are using. If i was you i would stick to strictly blue or do green and red. If you want to refer to some decklists search GR tron and Urza Tron for some ideas. Then when you choose a color you can cut a lot of cards from your deck. But for now a place to start is to cut all of the Gruesome Slaughter the Morgue Burst the Haunted Plate Mail the Adverse Conditions the Brutal Explosion then Grip of Desolation the Ruination Guide. Then you will be down to 60 cards and then that will be a good start. Put a message on my profile if you would like further help. And great deck idea so far!

Thank you very much with this help, glad to hear that you like my deck :) Problem is that I have access to just few old cards, so most of my cards are just from recent series...Ill cut those cards you mentioned :)

Sounds good then but if you ever want to start investing some money into this deck then get the Urza lands because you can potentially have Desolation Twin on turn 3

Ok, Ill remember that, thank you :)

Since you are considering removing red from the deck you should consider what you want exactly from the deck. Most blue and black decks are punishing control decks that utilize counter spell and removal spells. Then you drop your win conditions in the late game when you have removed their threats. So, if you want to do that you should then remove a substantial amount of your creatures and only keeping your best ones. And then replacing the removed creatures for counter spells and removal spells. Hope this helps.

So, I want this deck to have mana acceleration to cast strong creatures and have some protection until it does so (counters, Tide Drifter etc.). After many games it showed up that those red cards are actually weak in comparsion to other so I want to replace them with other ones. I can include some other new cards (maybeboard) or almost every card from Battle for Zendikar. But I will wait until Christmas when I and my friends will open new boosters so I will have more cards to choose from :)

I personally think the Sludge Crawler is way better than the Salvage Drone:

1. If you play Sludge Crawler on turn 1 he can be a 2/2 on turn 2 if needed and a 3/3 on turn 4 if needed. And of course you don't even need to make him bigger, the potential alone will let him come through and not be blocked way more often than Salvage Drone.

2. If the game happens to be dragged out for longer than usual drawing a Sludge Crawler is almost like drawing a big creature while drawing a Salvage Drone is like drawing nothing at all / a land.

Well yes, but I like Salvage Drone more because of its ability - I can get bad hand and this can save me.

Hum.... I did some playtests with this deck. Maybe I had really bad luck, but I just felt totally useless until maybe turn 6 or 7.

Overall what is your budget? I can give much more specific advice if I know your budget constraints. You will likely want to cut down the deck to 60 cards regardless.

My budget is approximately 5 dollars. I know it is not much but I've already invested lot of money to mtg and I don't want to invest more now...On the other hand, I have the Jace vs Vraska duel deck, which I can use to enhance this one.

Yeah, $5 is not much to work with. I guess the easiest way to help then is to go over archetypes where you frequently find Eldrazi.

The first archetype is called Tron. This also seems like it might be more in line with the archetype that you are trying to build here. Tron is a control deck that uses the urza lands (Urza's Mine, Urza's Power Plant, and Urza's Tower) to generate huge amounts of mana to then play big 7 drop spells on turn 3 or 4. It is an easy way to ramp into your big Eldrazi threats as it requires little build around being that the ramp is built into your lands. Tron is typically Mono Blue or Gruul (Red/Green), but you can easily make it in other colored variants.

The second archetype is more aggressive and can be tailored to also be rather midrangey. These shells abuse Eldrazi Mimic, Thought-Knot Seer, Endless One, Matter Reshaper, and Reality Smasher. This core of cards can make the deck very aggressive and is capable of setting up an intimidating board state of fatties rather quickly. It is commonly played in Bant (Blue/Green/White) colors for other aggressive eldrazi such as and Eldrazi Skyspawner, and Mist Intruder and cards such as Collected Company to further accelerate the board state. Other cards that could see play are Blight Herder, Void Grafter, Ruination Guide, Salvage Drone, and Blisterpod.

A third archetype is a fairly new one. But it uses effects that exile your opponent's spells and creatures and then process then with eldrazi processors such as Wasteland Strangler and Ulamog's Nullifier. Effects that are used to exile opponent's stuff are Path to Exile, Flickerwisp, Brain Maggot, Tidehollow Sculler, Delay, and Spell Queller.

The fourth archetype that I can think of revolves much less around Eldrazi, but still uses them rather effectively. This is Death and Taxes. A typically Orzhov (Black/White) shell that uses tax effects such as Leonin Arbiter and Aven Mindcensor to cripple your opponent while you destroy their creatures with Path to Exile and their mana base with Ghost Quarter -- which they have a difficult time responding to due to the heavy taxes you place on them. The deck runs lots of lands that tap for colorless mana. As such, playing cards like Thought-Knot Seer and Eldrazi Displacer is quite easy.

I bring up these archetypes because right now your deck is kind of all over the place. In order to make the deck more consistent, you need to cut down on the number of things the deck aims to do. It is very much sort of a Jack of all trades, master of none sort of thing. If your deck tries to do too much, it isn't going to be successful at any of those things. As such if you refine your deck to more closely resemble one of the above shells, then your deck will run much smoother. Again, it seems as though you might be aiming for more of a Tron-esque list where you ramp into big creatures. But I just want to make sure before I give suggestions for cuts, additions, and cards to aim for someday.

Thank you so much for this list, although I fear that I cannot build any of these...I play mtg casualy only and because of that my decks do not have to be that efficient (and expensive). On the other hand I would like to have rather consistent decks. So what I will probably do is that I will remove all control cards from the deck and add colorless ramp cards and cheap removal cards. It won't be as strong as decks you have mentioned but it will be sufficient for me :)

From the removed cards I'll build a control deck (probably Dimir or Sultai one).