FrostPunk

I am looking to design a set based on arctic and steampunk themes. I would appreciate any help in doing this as I am relatively new to custom card design. A loose plot is as follows: Most human inhabitants of the plane live in these scattered steampunk settlements, roughly in the Victorian Era. These settlements are connected by a train called the Northern Express. A group of disgraced hermits who are upset with the industrial revolution claim that the new cities took their land and destroyed animal habitats, so they train animals to attack the cities. The set should have a few mechanics. The first one is Vehicles to represent the trains and hot air balloons the people use to travel. Snow permanents also make sense given the setting. I think we have room for one or two more original mechanics. Here are the cards I have made so far, just so you can get a general sense for the set: https://mtgcardsmith.com/user/Drag0n/sets/42309.