First of all, new ability: Metalcraft. As we'll see troughout the rest of the spoiler, metalcraft works when you control 3 or more artifacts. In this case, we have an 8/8 trample for 4 as long as you control 3 or more artifacts. In limited play this is going to be awesome. In a set full fo artifacts, metalcraft is easy!
Meh. Well... this might be good in limited play, but only because it costs nothing to activate.
From "meh" to legendary dragon goodness :p
Skithiryx, the Blight Dragon is a 4/4 flying infector regenerator for 5 that becomes all that and gains haste if you pay 1 more. And, if you ask him nice, I think it makes coffee and toasts too!
It seems the spellbombs are back. For the look of it, the new mechanic is "X, tap, sacrifice: do something and more (probably draw) if you pay 1 specific mana." I think the previous spellbombs were better, but let's wait to see the others.
Proliferating 1/1 flyer for 2. Here birdie birdie birdie! :p
A 6 mana 5/5 flying artifact is nice. A 6 mana 5/5 artifact that breaths fire for 2 is pretty cool. A 6 mana 5/5 flying artifact that breathes fire for 2 and makes Days of Judgement to nonland permanents with converted mana cost X that only your oponent controls... O.O *faint*
Hahaha, me and a friend had a talk about this. A card that simply said Proliferate. And here comes WotC and prints a proliferating instant cantrip! There you go Pedro :p
Ah, our first Planeswalker. Venser the Sojourner. A 5 mana UW planeswalker that seems made for the UW planeswalker control deck. Blink Sun Titan, Day of Judgement, Sun Titan returns, return something from my graveyard. It seems great, and the -1 ability also fits nicely into the UW, letting it attack for the kill with Colonnades and Sun Titans. I dunno about the ultimate, but it also seems nice, although i'm not seeing it get much use.
Another metalcrafter. This time, a "Bear" that becomes 4/4. Nice.
Who doesn't like 0 mana creatures? :p
This seems nice, especialy when your oponent is at 9 poison and swetting :p
This seems a nice addition for the Goblin tribe. A 1/1 trample that get's +2/+0 for each equipment. If the equipment gives +1/+1, it's a 4/2 trample. I'm hopping for some cheap equipments to swing this baby at turn 2 or, at least, turn 3.
An indestructible equipment. Well, equipments were never much the target for destruction, but never the less, the +2/+0 for 2 is not that bad.
Imprint is back, and with it, Clone Shell. A 2/2 for 5 seems kinda bad, but the ability to put a free biggie into the battlefield when it dies compensates for it I guess.
Who doesn't like a 1/1 infecter flyer for 2?
Palladium Myr comes to bring back the ramp into limited. Turn 3 one of this, turn 4 a 6 mana biggie. Nice.
Now on to the imageless cards:
Elspth Tirel 3WW
Planeswalker - Elspeth
+2: You gain 1 life for each creature you control
-2: Put three 1/1 white soldier creature tokens onto the battlefield
-5: Destroy all other permanents except for lands and tokens
Monowhite/XW tokens anyone? :p
Tempered Steel 1WW
Artifact creatures you control get +2/+2.
Ichorclaw Myr 2
Artifact Creature - Myr
Whenever Ichorclaw Myr becomes blocked, it gets +2/+2 until end of turn.
So so. Good for a common I guess.
Mox Opal 0
Metalcraft - tap: add 1 mana of any color to your mana pool. Activate this ability only if you control three or more artifacts
In a set with this many artifacts, I really don't see Metalcraft hard to achieve :p