Can't take too much credit because the deck builds itself. Pretty much all of Feln's tools and bombs are within this format's card pool.
4
Permafrost and 2
Suffocate might seem like a lot on top of the 4
Vara's Favor and 3
Snowball (provided by)
Jotun Hurler), but from my short testing experience there's a lot of aggressive decks (mostly fire) and there doesn't seem to be a lot of stuff that can go over this deck anyway. 4
Wisdom of the Elders because drawing is good,
Ice Bolt,
Annihilate and
Feeding Time kill pretty much anything.
Blight Pass Smuggler because having a market is great, and the rest is good hard to deal with units.
Champion of Cunning needs no introduction, Rost, Walking Glacier is pretty much unstoppable, and even when silenced is still a 7/7 (not sure if 3 is the right number yet),
Feln Bloodcaster is a good early blocker and sometimes steals some good stuff, Black Sky Harbringer instantly destroys any aggro deck's hopes.
Dizo's Office is a good card that kills stuff, gains you life and draws you cards, and that's kind of where the deck wants to be anyway so I run 2.
Lightning Storm vs swarms,
Polymorph for annoying units (in case the maindeck feeding time isn't enough),
Eye of Winter for midrange fat stuff you might find,
Azindel's Gift to hose control and
Vara, Fate-Touched because she's a thicc unit that gets another thicc unit.