Roar

If you want to make this a fast deck you should focus on:
Warren Instigator and Goblin Lackey

This is a really fast Goblin Deck, which I think is extremely effective
http://www.mtgvault.com/roar/decks/goblin/

I like your version of the Eldrazi deck. Wouldn't take much modification to keep it legal. Just skip the Sol Rings.

Please see my own deck, where I focus more on fishing for mana by splicing with green.
http://www.mtgvault.com/roar/decks/eldrazi/

I like the modifications you did to the deck. I think it will work better now :)

He's transmuting Drift of Phantasm....

Not sure why you compare Ethersworn Canonist with Etherium Sculptor as they're very different. Etherium Sculptor would greatly assist you in getting those big artifacts on the table.

Still think you're keeping the deck too slow by sticking to all three colours and a high manacurve. But as this is a casual deck, I guess it depends on your match-up at home :) Would have loved to play this deck against my own artifact decks :)
http://www.mtgvault.com/roar/artifact/

PS: Your English is very good :)

Hey,
To be very honest I have to agree with you :)
Vraska is there because I have two of them lying around, and we sometimes like to just make the matches Plainswalkers vs. Plainswalkers. Jarad is there for the same stupid reason. He represent the Guild. He is however extremely effective together with Lord of Extinction in some multiplayer games.

On the other hand it is a bit expensive deck to not trying to maximize it's potential. And the cards you're suggesting are very good options :)

Thanks

It would allow you to set up your combo faster. Blue also give you access to counterspells that can protect your descendants. Right now you're a bit vulnerable, as the deck rise and falls on your ability to draw and utilize descendants.

You should consider Thalakos Seer, as it is basicly unblockable and gives you an extra card draw.

Please see my ninja deck for comment:
http://www.mtgvault.com/roar/decks/ninja/

You should consider the following cards:
- Ornithopter for early ninjutsu of your ninjas. It is an incredible effective and fast combo, as it cost 0 mana and flies
- Thalakos Seer, as it is basicly unblockable and gives you that extra card draw.

Please see my ninja deck for comment:
http://www.mtgvault.com/roar/decks/ninja/

You should consider the following cards:
- Ornithopter for early bounce of your ninjas. It is an incredible effective and fast combo, as it cost 0 mana (common in Antiquities
- Thalakos Seer, as it is basicly unblockable and gives you an extra card draw.

Please see my ninja deck for comment:
http://www.mtgvault.com/roar/decks/ninja/

Is it an idea to splice the green with blue instead of red. That would give you the chance to search for Descendant's Path with Drift of Phantasm while Serum Visions can help you to set up the combo. I would also include Expedition Map to search for Mutavault.

I like this concept.
It is similar to my own Golgari Deck, but kind of opposite :)
http://www.mtgvault.com/roar/decks/golgari-swarm/

From personal experience I know the deck is vulnerable agains creatures with protection Black/Green, so I added Pernicious Deed and Spiritmonger. You could also include Viridian Emissary, as it will work well with your scavenge theme and increase your mana ramp.

Thought about the same concept, but already having 4 artifact based deck I've put it on the shelf.

I would increase the number of lands with this type of mana curve. You may want to slim down your manacurve as there are too many high cost cards. I would also consider to trim it to blue/white as your mana curve don't afford three colors without additional mana ramp.

I would evaluate to include the following cards
- Master of Etherium
- Etherium Sculptor
- Thoughtcast instead of Fabricate since this is not a combo-deck
- Phyrexian Metamorph
- Etched Champion
- Spellskite
- Steel Overseer

I would loose the following cards
- All Black cards
- Open the Vaults
- Sphinx Revelation
- Azorius charm
- Glassdust hulk
- Fabricate

This switch will keep it Modern, and may even make it a cheaper deck :)

Please see two of my artifact decks, maybe there are some ideas there. Or you might have some input to me :)
http://www.mtgvault.com/roar/decks/artifact-affinity/
http://www.mtgvault.com/roar/decks/hard-steel/

If you want a look, you can find it here:
http://www.mtgvault.com/roar/decks/eldrazi/

I mostly just post the decks which I already have in my drawer, but all feedback is appreciated
http://www.mtgvault.com/roar/

I like the concept of Mutavault + Descendant Path. But since the deck is heavily dependent on getting out the Descendant Path, you might want to include something that lets you fish for it.
My own Eldrazi is more of a mana ramp Eldrazi, but it normally let me get those big ones out by round 5/6.

I agree.
- This deck is a bit slow for being an all Soldier aggro deck. Champion of the Parish doesn't quite reach his full potential, since there are so many Kithkins in the deck. Tried to maximize his potential in my Human deck:
http://www.mtgvault.com/roar/decks/humans/
- I would also include some removals (Oblivion Rings) in case your opponent has any nasty lock down enchantments like Ghostly Prison, Elephant Grass, Solitary Confinement etc...
- I think Captain's Call is too costly card for only 3 soldiers. I prefer Raise the Alarm, as it gives you the benefit of surprise plus more aggro to the deck. If it's not essential to keep it "Soldiers only", you may want to include Spectral Procession since you don't have any flyers. A Faerie deck would simply fly over your soldiers.

I agree, and if you haven't won by turn 4/5 it is very likely that your will loose. I've got a slightly different infect deck, but I have the same challenge with my deck.
http://www.mtgvault.com/roar/decks/fast-infect/

Pendelhaven is there in case you don't need that mana otherwise it works like a forest. It is currently priced in the same category as Rancor, so not overly expensive. But if you hit your budget constraints, then that is not the card I would invest into :) I guess that means that Inkmoth is out the window as well :)

Personally I would put Invigorate instead of Giant Growth, saves you a mana and gives you an extra +1/ +1. The extra life your opponent gets, doesn't matter. Pendelhaven could also replace one of your forests. Gives you an extra boost at no extra cost.