So, kind of hilariously, the Snow deck actually appears to be viable in Modern. I've been beating up people with the meme in the MTGO practice room, which i'd say is roughly equivalent to a random FNM? An even mix of tier and jank basically.

The big things this deck has going for it is that Dead of Winter is basically a three mana Plague Wind, Stalking Yeti beats humans by himself, and Abominable Treefolk is generally a 1 or 2 attack kill.

Why is such a silly meme deck good? Well, it all starts with the manabase. Prismatic Vista, Into the North, and Arcum's Astrolabe mean that with five basics, you start with 13 sources of each color. That's a lot. The second thing that really powers this deck is the draw engine. Marit Lage means you always hit on Scrying Sheets - which you can find with Into the North, and Glacial Revelation will often draw 4+ cards for only three mana. Early game is covered by Arcum, Ice Hide Golem and Ice Fang Coatl, which provide early cantrips and offense/defense. Finally, the removal suite is really strong with Skred, Dead of Winter, and Stalking Yeti solving most problems presented by creature based attacks.

The deck is by no means perfect, little graveyard interaction, weakness to combo/non-interactive strategies, and no lifegain are all issues, and you can only get away from the Snow theme so far before it loses all value. The main things this deck wants that it can't get from Snow cards are: lifegain, graveyard hate, combo hate, a way to give Marit Lage tokens haste and trample.

This is where the list is now, it's a fun midrange deck with potential:

Creatures - 13
2x Icehide Golem
4x Ice-Fang Coatl
4x Abominable Treefolk
3x Stalking Yeti
1x Adarkar Valkyrie

Instants - 4
4x Skred

Sorceries - 7
4x Dead of Winter
4x Into the North
3x Glacial Revelation

Enchantments/Artifacts - 7
4x Arcum's Astrolabe
3x Marit-Lage's Slumber

Lands - 24
4x Prismatic Vista
4x Highland Weald
1x Boreal Shelf
1x Arctic Flats
1x Frost Marsh
1x Tresserhorn Sinks
4x Scrying Sheets
2x Mouth of Ronom
2x Snow-Covered Forest
1x Snow-Covered Island
1x Snow-Covered Plains
1x Snow-Covered Swamp
1x Snow-Covered Mountain

Sideboard
4x Damping Sphere
4x Rest in Peace
4x Weather the Storm
3x Force of Vigor