I haven't personally seen anyone else dumb enough to try this. But the idea is running all snow lands. And then you play Natural Affinity and follow it up with Dead Of Winter to hopefully one sided board wipe and Armageddon the opponent.
Of course you're totally boned and everything goes out the window if they happen to be running all snow too but...lets just hope they don't.
I like the combo itself but im still not sure of an actual wincon for just in case the opponent doesnt just immediately scoop when you pull it off. ATM planeswalkers come to mind. Just cause they'll survive the board wipe and can kinda be removal and wincons themselves. I'm actually kinda liking old ass original Liliana Vess here just cause she can tutor and potentially be the wincon after everything is wiped.
But yeah the idea is just try to survive and tutor for the pieces and hope you can get to 6 and pull it off.
You can fetch Woodland Chasm as well as the Snow basics. I think I'd prefer fetches to Cemeteries.
Your card selection seems to indicate you plan to play against creature decks nearly exclusively. That many main-deck sweepers seems unnecessary to me. I'd prefer to see Abrupt Decay in some number for sure, but maybe I've been out of it too long. Hand disruption can also help with the prolonging-the-game strategy and is effective against non-creature decks as well.
That also seems to be a whole bunch of fairly high-costed planeswalkers.
Much thanks for the feedback! Fetchlands and Thoughtseizes are def great and something I just didn't think of as alas I don't have them IRL but I do wanna see the like "optimal" version of what I'm going for so I added them in.
And yeah, as for the Planeswalkers, they're definitely like just in there for the moment cause I couldn't really think of any other "finisher". I've actually been able to tutor into the combo and play it fairly consistently, I just need a way to like actually finish the game before they just start playing lands and threats again.
But im def looking for like a more consistent wincon, even if it some other combo or something to just wrap the game up once the combo goes off. And yeah, def worth picking up Natural Affinity. Last I checked it was under a dollar on TCGplayer.