Muktol

+1
A great keyword to use with persist would be undying. When a creature with both undying and persist dies both abilities will trigger. Since you control both triggers you choose what order they resolve it. Whichever one resolves first will return the creature to the battlefield with the appropriate counter. The other trigger won't do anything when it resolves. So you're able to sacrifice a singe creature 3 times per turn! Good creatures with this keyword would be Butcher Ghoul, Geralf's Messenger, Demonlord of Ashmouth or Undying Evil if you prefer an instant spell.
Mortician Beetle is a faster version of Bloodflow Connoisseur.
Viscera Seer could be an option to get in your hand what you need in this deck. Altar's Reap would provide some additional carddraw.
Tragic Slip is one of my favourite removals when you play sacrifice decks as there are not many creatures that can withstand a -13/-13 spell.
Depending on your budget Grave Pact could be a real matchwinner.

Greetings
Muktol

What about Skyknight Legionnaire or Viashino Firstblade? Both are cmc3 cards but the Firstblade comes as a 4/4 for one turn and the Skynight is a 2/2 flying (tough that doesn't entirely fit the theme ;) )
And wouldn't be Emerge Unscathed (or Center Soul) the better choice instead of Artful Maneuver to keep creatures alive? Temur Battle Rage could also be an option.

Basically I would look for some more spells with flashback and creatures that either have some effect while in the graveyard or have the ability to return/ return other cards to the battlefield. The colour of choice would be black as it has many effects that allow you to get cards into the graveyard and also re-use them from there.
Evolution Charm is a very versatile card: It can ramp, it can give your finisher evasion and it can bring back a creature from your graveyard in case you've milled the wrong cards. Another very good card for selfmill/ graveyard decks is Spider Spawning. It helps you to get some creatures on the board and doesn't mind if it gets milled due to flashback... which requires at least one black mana.

Greetings
Muktol

+1
I would trade Aetherflux Reservoir and 2-3 of the Divine Favor for some Angelic Accord. Especially strong as it also triggers in your opponents endstep, making Soul Warden and Soul's Attendant even better.
Ordeal of Heliod could also be an option instead of Divine Favor, especially when used with Ajani's Pridemat.

Greetings
Muktol

The description could be a little more detailed ;)
A very versatile spell here would be Muddle the Mixture as it enables you to tutor Doorkeeper or any other cmc2 spell. I would also recommend Echoing Truth as this card can help you against token-heavy decks or put any other nonland card onto it's owners hand.
If you want to add another color then green would be an option for mana-acceleration or black for removal. Both have some good defenders and some interesting support spells.

Greetings
Muktol

Normally I don't comment on legacy decks because of my limited card-knowledge in this area, so correct me if I'm wrong.
Legacy tends to be awfully fast and Sword of Body and Mind/ Sword of War and Peace seem to be a little bit slow, even with Puresteel Paladin, and you would also need something to get them into your hand when you need them like Steelshaper's Gift or Stoneforge Mystic.
When using Captain's Claws I would definitely use Stoneforge Masterwork over other equipments as it's nearly as good as Cranial Plating.
Swiftfoot Boots, though slower than Lightning Greaves, have one big advantage: When you have nothing else on the battlefield than one creature you still can equip things to it unlike the greaves.
Etched Champion could be a superb finisher with it's protection from all colours.

Greetings
Muktol

So basically the strategy you want to execute sounds like "Mass Overrun" to me.
Based on this here is what I would do: Remove most of the creatures because they work more for a single-beater approach. The number of Goblin Chieftain should be upped to 4, Goblin Arsonist can stay and the rest would have to go.
Use 3-4 Act of Treason, and no Mark of Mutiny, but be prepared to replace those with some other removal from the sideboard. Goblin Rally is a good card but Hordeling Outburst would be superior to it as it costs less, thus is faster, and brings a better mana/token ratio with it. Artillerize can be replaced with Goblin Grenade, costs less to play but is only a sorcery. Lightning Strike could be replaced with Lightning Bolt. Remove Goblin War Paint for something more mass-strengthening spells. As for the lands I would use 20 simple Mountains and nothing else at the moment.

What I can recommend as replacement for those cards:
Goblin Bushwhacker, Goblin Wardriver, Legion Loyalist, Mogg War Marshal, Purphoros, God of the Forge, Shared Animosity

If you want to test Dark Favor I would remove Infernal Scarring for it as it gives you a more aggressive play but you will lack that draw.

Hyena Umbra has the advantage of giving additional first strike, but it protects only one time (And also doesn't work against -X/-X spells like Tragic Slip) while Skeletal Grimace can be used repeatedly to protect your creature. It's a question of what you're up against. With a deck that will play a removal every in between 10 other spells you will be better of with Hyena Umbra while against e.g. a red/ black deck with many destroy or direct damage spells that desperate tries to get rid of your creatures so that his can attack Skeletal Grimace can be a real matchwinner.

Ornithopter is free but the problem I see here is that he does little on his own. It can buy you some time but that's normally not what you want for an aggressive deck.

Guul Draz Vampire is a simple 1/1 creature without any abilitys at the beginning, which you normally wouldn't even consider adding to your deck. I have never seen people using Walking Corpse because a simple Prickly Boggart or Tormented Soul can be better than that. When your opponent is now at or below 10 life you get a respectable 3/1 with evasion, but in my eyes this is overkill as you're already on your way to win this game. If you want to use him I wouldn't use a full playset but rather 3.

Some more information's would be nice: Whet strategy do you want to execute with this deck (basically it looks like a goblin burn deck), are you willing to buy/ trade new cards, what's the overall/ per card budget, possible legality limitations, and so on.
http://www.mtgvault.com/muktol/decks/why-you-should-add-description/

Greetings
Muktol

Galvanic Blast could be an option instead of Fall of the Hammer or Fiery Fall as you should have enough artifacts to activate metalcraft. When you want some more aggressive equipment that I would take a look at Bonesplitter and Leonin Scimitar. Assault Strobe could also be an option as a double striking Goblin Gaveleer can be the nightmare of any opponent, especially when combined with some evasion or trample equipment like Horned Helm.
Personally I'm no big can of Accorder's Shield as the zero mana-costs is opposed by a {3} mana to equip it.
My own Goblin Gaveleer deck has a strong white splash to get access to some further Metalcraft creatures as well as some support spells. (e.g. Auriok Sunchaser, Ardent Recruit, Strength of Arms)

Greetings
Muktol

+1
When working with white and black enchantments I would take a slightly different way on the creature side because of one card: Edge of the Divinity. This gives you a whooping +3/+3 for a single black or white mana as long as the creature is black and white. A mono black creature still gets +2/+1 for a single mana. And there are some good alternatives for creatures you where using: Mourning Thrull can replace Vault Skirge as they do exactly the same. Nip Gwyllion can replace Guul Draz Vampire (which I'm no big fan of) or Ornithopter. My own enchantment deck uses Kingpin's Pet and Nightsky Mimic as further creatures.
Necromancer's Magemark is a strong card that further enhances ALL your enchanted creatures while protecting them, tough not the enchantments attached to it, from going to the graveyard. Skeletal Grimace is a strong card when you go against a removal heavy deck while Dark Favor gives +3/+1 for 2 mana and 1 HP.

Greetings
Muktol

The basic question is if you want to play a more burn-based deck with some creatures as support or a more creature-based approach? Mixing both strategy's isn't the best idea because spells like Assault Strobe or Artful Dodge simply don't have much effect in a burn-based deck while e.g. Pyromancer Ascension is best used in. So a little more detailed deck- an dhow to play description would be a idea perhaps ;)

Greetings
Muktol

I will interpret "pretty recent" and the card-choices you already made as "modern legal". SO here are some suggestions, based on my own goblin deck:
Goblin Bushwhacker ...provides your goblin army with a +1/+0 and haste boost if he is played kicked, all in all not bad for just 2 mana
Goblin Piledriver ...strong attacker that gets +2/+0 for each other attacking goblin
Purphoros, God of the Forge ...tough he does little on his own he deals 2 damage to each opponent whenever a creature enters the field. Basically he is an indestructible Boggart Shenanigans that can also get a creature
Shared Animosity ...an alternative to Coat of Arms with the advantage that it only triggers for your creatures, not for every one's
Furystoke Giant ...an alternative to Voracious Dragon. The advantage is that you don't need to sacrifice your goblins and he can be used again, thanks to persist.
Massive Raid ...a (cheaper) alternative to Roar of the Crowd, the only thing it doesn't count would be Boggart Shenanigans.

Greetings
Muktol

The drawback on the greaves is that they give shroud, not hexproof and thus prevent the equipped creature from getting more equipment attached to it. Perfect to protect Auriok Steelshaper tough.

+1
Personally I would lower the number of creatures by 1-2, the lands by 1-2 and increase the number of equipment instead as you need a whole bunch of them to make this deck real effective.
I would also swap Darksteel Axe for Bone Saw or Cranial Plating. The first one makes the deck faster while the later one gives it more punch.
Puresteel Paladin could be an option instead of Auriok Steelshaper. If you're looking for a way to get more creatures on the field that don't need to be equipped to be effective in this deck then Auriok Sunchaser and Ardent Recruit could be of interest for you.

greetings
Muktol

@ exterminator5000: There are some, more or less, aggressive variants of landfall tough it often depends on how you define "aggressive". I did a deck with Ghostly Flicker that could get up to 5 landfall-triggers per turn and a plain green/ white (pauper) variant that can have a 12/12 on turn 3, so it's possible.

@OrderOfRogueOne: Basically you will have to decide which strategy you want to follow. There is an aggressive strategy and a strategy that builds up more slowly and uses more cost-intensive spells. The problem here is that many people think that landfall will give them enough mana to play big spells and make cheap creatures more effective. This is only partially true. The problem is that you need as many land-drops per turn as possible to make some of the small creatures effective. When you want to play big creatures you will have used most of your ramp until you get your first threat on the field, so there's nearly no way to activate e.g. Rampaging Baloths 3+ times because you will simply have used most of your spells to get him out as fast as possible. So small, aggressive, and big, controlish, creatures are no good mix as they require a different strategy. There are some exceptions, like Undergrowth Champion or Retreat to Kazandu as these permanently strengthen a creature and thus improve it long-term.

Here are some suggestions for a more aggressive landfall-deck:
Harrow ...you have to sacrifice a land but it brings you two lands untapped!
Khalni Heart Expedition ...a slower ramp as it requires landdrops itself but you still get 2 lands for a very good price.
Explore ...allows you to play an additional land this turn and you may draw a card.
Snapping Gnarlid ...Scythe Leopard's bigger brother
Ghostly Flicker ...requires a blue-splash but can either protect 2 creatures or trigger landfall 2 times
Kor Skyfisher ...solid flying creature that allows you to return a land (or any other permanent) to your hand and play it again.
Adventuring Gear ...equipment with +2/+2 landfall effect.
Mana Leak/ Apostle's Blessing/ Blossoming Defense/ Vines of Vastwood ...landfall-creatures can be a big threat but they also have a big "kill me" sign over their head, and no protection, so some spells that allow you to protect them against your opponents removal-spells could be an idea.

Greetings
Muktol

I will tell you the whole story, perhaps then you will understand my caution, and fear's, better.
After a real long time I finally found 2 people who where interested and wanted to try out Magica so on the next occasion that my playgroup got together I invited them to come by and give it a try. I prepared two decks that I tried to keep simple: Simic Evolve and Gruul Stompy. I did know that one of them often plays different computer games and has a fast grasp, he got the Simic deck. What I didn't know is that the second one has already played Yu-Gi...but only on the computer, she got the Gruul deck. The first (and only played) match started and all was fun and games until Simic threw out an Overrun, with roughly 5 creatures on the table. The Gruul player simply went into brainlock-mode because it was all to much for her, to much calculating, to many different cards, that when playing Yu-Gi the computer had done all those calculations, and so on. They said that they still where interested but I never saw them again, and that's roughly a year ago now.
After that I did step back a few steps to look at the deck I designed and talk to some of my buddy's and the tenor I got was that the decks where just a little to complicated for first timers. So I decided to re-built them and keep my fingers off cards that used more than one effect (like do this AND that or flashback or such things), hit more than one creature (Overrun) or had rules/ keywords that where just a little to complicated to understand (Color protection). What I tried to achive where decks that all roughly had the same power, the same costs ($) and are not to hard to understand.

Your deck looks fine and I will use 3 Mind Grind instead of Chronic Flooding and perhaps remove the last of it for 1 Crypt Incursion (or something else, a single one of this card is no use). Wight of Precinct Six is a card that can be a pain in the ass as you constantly have to check how many creatures are in your opponents graveyard or keep track of this somehow, personally I would favor Jace's Phantasm. As for the planeswalker I would probably use Ashiok, Nightmare Weaver. You'll loose carddraw but her "mill" effect is stronger and you can use your opponents creatures against him. If you're interested I have a second beginner's series (e.g. the above mentioned Simic (http://www.mtgvault.com/muktol/decks/ug-simic-beginners-deck/) and Gruul deck) with other building restrictions: 50$ budget, modern legal but no other restrictions. This would be a way better frame for a mill deck I think.

Personally I don't consider the planeswalker decks WizKids delivers to be starter friendly. Nearly no card is in the deck 4 times which roughly doubles the number of cards you'll have to know and there's nearly no chance for a repeatable game feeling...Game 1 will/ can be totally different than Game 2 or 3. The advantage is that those cards are normally just from one Set so the number of different mechanics is at bay. If you buy 2 of one PW deck and throw them together you will likely end with something usable.

Any particular reason why you used (nearly) every card only once?
The question is how you want your deck to behave aka what should the decks Strategy be?. It would be a good idea to write this down in the deck- or how to play description of this (and any that might follow) deck. There are numerous ways, even for a myr-deck: Mass-overrun, big creatures or burn are just some that quickly came into my mind.

Nobody HAS to like any deck or think it's good. :)
Sometimes you have an idea, and tough you don't know if it's good you build something with it and post it, maybe somebody just waited for this idea or has any good suggestions on his own.
Beside that I'm not really happy about the current state deck either, I'm also not really sure if mill is a strategy first-timers should be confronted with.

Archaeomancer fits for me as he allows a spell already played to be used again and also gives you a (small) defenender. I first considered using Augur of Bolas but in the end opted for the more expensive (cmc) Archaeomancer as you allready know the spell and it's effect while the Augur forces you to, more or less quickly) decide against some, perhaps unknown, spells.
One of the reason I didn't add some of those cards is that they are rather expensive ($). I decided to go wit a 15$ budget for all the simple beginners decks (like this one) and with a 50$ budget for the more complex, but still beginners, decks. Hedron Crab and Mind Funeral are clearly out because of their price. Oh and Fraying Sanity costs 5,5$ per card so it's nearly double the costs of Hedron Crab ;)
Also I tried to avoid cards that needed permanent attention like Hedron Crab, Manic Scribe or Wight of Precinct Six. For me a beginner is not supposed to be punished because he forgets something on his own field.
Traumatize wasn't used because it's a rare card and I dislike it because I think it's not really effective...tough I could be wrong in this deck.
I did consider using Mind Grind but in the end decided to go with Keening Stone...tough I'm also not entirely happy with this card as no other beginner deck has any artifact removal. Only blue can handle it with a counterspell.

Jace's Phantasm could be an option instead of Guard Gomazoa.
I did a 2/2 split between Mana Leak and Psychic Strike (The counterspell you mentioned)

I simply didn't know what else to add. I thought about Millstone but as none of the other decks has any artifact removal (and there are no sideboards) I didn't want to add another card that only blue could engage with a counterspell. Also, as most of the decks are two-coloured with only 2(x4) duallands and Evolving Wilds, you can play around but you could loose an important mana-fixer. I was thinking about Balustrade Spy but it's a rather expensive (cmc) and not really reliable mill-card.