Okay here's a new thing and some changes/updates/thoughts. I've updated the OP with stuff too.
SeerHere it is the Seer, now the on play effect is very similar to Barbarian, but I have a new Barbarian because the old one wasn't going down well. So hopefully this is a bit better. When you pay the tokens you only add Ice tokens to your Avalanche, if that wasn't clear.
AvalancheYep there it is, Avalanches are very similar to Saboteurs it turns out. 15 seems like a good number for Avalanche, not too fast that it becomes oppressive every time and not too slow as to never matter. There are also ways to make this hurt not so much, mainly just gaining expendable cards, Silver gainers and stuff like that. I'm using Violet CLM's image generator for these which doesn't have a template for States, so sorry about that.
New BarbarianOkay so Barbarian is now a Coin token Oasis. That is very probably too good for $4, but maybe it's borderline? It could have an on-gain penalty maybe if it's a little too powerful. It should be much easier to get the attack going now that it's non-terminal. Also a note that I think I forgot to mention before is that this particular attack is very devastating early on, when your hands are basically one $3-$4 card and Estates/Copper. Which is the logic behind why I chose this particular attack to be delayed by the tokens like this.
Cargo Ship buffCargo ship was on the weak side, but was in an awkward position where it was a bit too good at $4 so I made it a little better at trashing Coppers.
IglooThis snowy themed expansion needs an Igloo right? It was surprisingly hard to find a picture actually. This is a pretty simple idea, although as usual the wording sucks. This is isn't the best thing ever but it's not too bad, I've had it since before Nocturne but forgot to post it earlier, I now worry that Tracker is a bit similar to this and more exciting with the Boons.
HunterI'm not overly pleased with Hunter at the moment, perhaps switching the bonuses would make it better. Action for +2 cards, Treasure for +1 action and Victory for Coin token. Discarding an action for +1 action does rub me the wrong way a bit and currently hunter is terrible without a Victory card. We'll have to see, I worry that it'd be hard to remember which goes with which if they're switched like that though.
@Co0kieL0rd: Thanks for the post! I agree with most of what you said - hopefully you like the changes I made this time. Apart from cantrip Cargo Ship, that'd be cwazy! Oh and I'm thinking of making Pioneer blow itself up for a Coin token if it fails to find a Copper - the Copper searching is functionally quite different to just a Peddler and it is a great subtle effect so It'd be a shame for it to die due to physical issues. But at same time I'm of the opinion that Hunting Party was a mistake and isn't worth the hassle so I guess that's still on the cards for sure.
Ah yes I almost forgot Venturer and Ice Cave have been retired for now, Venturer was strange and not very popular so I figured it should go and Ice Cave wasn't very interesting. Cold storage and Rediscover will get more attention soon.