The card that strikes me the most as a potential contender for both vintage and legacy is Jotun Grunt. Not because it hoses graveyard combos; every combo deck can wait before putting its key cards in the graveyard and win the same turn. But only because it is an incredible aggressive body that is very easy to sustain in eternal formats.
Overall, nothing in Coldsnap is better in Vintage than what is in my opinion the best card to hit the format in the two last sets : Shattering Spree.
I also ran a version of this deck between guildpact and dissenssion releases. I didn't play Skarrgan Pit-skulk nor Giant Growth because I was convinced they were too sub-par, but maybe I should have played the Growth (I had Birds of Paradise as a one-mana evasive creature so I'm pretty sure I didn't need the Skulk). I did have the two 3-mana boosting auras, 3 Might of Oaks and 3 Umezawa's Jitte. I was also playing the Stampeding Serow / Wood Elves engine, since it boosts Blanchwood Armor; but that trick is a bit slow, and I would remove it if I were rebuilding the deck, and I would perhaps add Giant Growth instead.
This deck is less vulnerable to Wrath of God than many other aggro decks, because you can easily win with a single overpumped creature. Very often, the control player will have to play *** to remove a big lone Silhana Ledgewalker, just to see you cast an other critter on your turn and reuse Moldervine Cloak and Jitte on it.
Coldsnap could easily add Ohran Viper without further changes. Besides that, the deck could be made snow, but it would then require much heavier modifying : I would add the Viper, Boreal Centaur, Scrying Sheets, Boreal Druid and of course change the forests for snow-covered ones. Could be good but it would be a quite different animal then.
Overall, nothing in Coldsnap is better in Vintage than what is in my opinion the best card to hit the format in the two last sets : Shattering Spree.
This deck is less vulnerable to Wrath of God than many other aggro decks, because you can easily win with a single overpumped creature. Very often, the control player will have to play *** to remove a big lone Silhana Ledgewalker, just to see you cast an other critter on your turn and reuse Moldervine Cloak and Jitte on it.
Coldsnap could easily add Ohran Viper without further changes. Besides that, the deck could be made snow, but it would then require much heavier modifying : I would add the Viper, Boreal Centaur, Scrying Sheets, Boreal Druid and of course change the forests for snow-covered ones. Could be good but it would be a quite different animal then.