Volcanic Fallout seems pretty good especially against Delver since they can't counter it.

I'll put it in the side board at least. The only thing that would prevent me from putting it to the main board is because of the 1 mana extra. I'll play test this later to see if there is much difference.

SO basically scrying sheets will be reduced to a mountain before you can use them properly? You might as well drop the entire Snow theme of the deck and use regular mountains instead.

Snow-Covered Mountain count as basic lands. Skred deals ridiculous damage later in the game, thus why Boros Reckoner is such a key card in this deck. Scrying Sheets is fine where it is because if it's not being affected by a blood moon, it makes dead mana as a peak on the top of the deck. Otherwise, its just a mountain because it doesn't change its super type of being snow, and I get to use it as such. There's no real down side to it.

I have played this deck quite a lot online, so I am happy to provide a couple of suggestions from my experience. I would take out maybe 1 relic and the Ironfoots for some Pyroclasm which so SOOO nice against Zoo and Affinity. Vandalblast is good if you can cast it, but by turn 5, you're dead. Shatterstorm is decent, but I really find Forked Bolt great against most aggro, so I keep 1-2 Mainboard. Kills Vendilion Clique, Snapcaster Mage, Pestermite, etc. Speaking of Pestermite, Combust is a go-to Sideboard option vs Splintertwin. Since Bogles is not that common and Ratchet Bomb blowing up for 1 pretty much stomps on their faces anyway, I think it wouldn't kill you to take out a couple Aura Barbs for other sideboard goodies. As a last thought, consider Magma Jet. Scry 2 is nice, and 2 Damage kills a lot of mana dorks early, and maybe pushes through a little extra damage late game. Hope this helps!

Also, if you feel like you need more Snowies, Coldsteel Heart is good for ramps.

Ancient_Sentinel, What say I take out in place for it?

Take out for what?

Oh, I missed your first comment xD I was asking about the Coldsteel Heart. I have a bit of Bogles hate because its a bigger thing in my local meta. I'm probably going to add in most of your suggestions in a little bit.

I have problems with Shrine of Burning Rage here. Why not Anger of the Gods or Pyroclasm?

@EverythingIsK I suggest taking out the Phyrexian Ironfoots, as they kinda suck. The only thing I saw they were good for was extra snow permanents, so I suggested Coldsteel Heart as a better alternative.

@WicKid52 I agree that Shrine is not too great here. I personally use Pyroclasm (a 3-of i think), and Anger was really mostly to beat Pod. I guess Anger wouldn't be too bad against the new Abzan decks, where it could kill Voices and Finks. Worth a test I guess.