RTF is a global modification that replaces all towns in the game.

Unfortunately, for some reason, I can't view all the images (it just redirects me to the image search with a pre-filled search query, and doesn't show the specific image).
I really liked the ice demon.
In general, I looked at the Wintrial lineup. I think the ice demons can be placed on level 6, and the yetis (level 6) can be placed on level 3.