1. A liberal amount of Agrellan Earth is applied (Martian Ironearth works fine as well) to the base and is left to dry fully until cracked. The thicker you put this on the more dramatic the effect will be. If you want to speed up the process you can hold the base under a hair dryer for a minute or so but I prefer to let mine dry naturally.
2. Then the base is covered in Blue Horror and allowed to dry.
4-7. Once the Nihilakh Oxide is dry, dry-brush is succession: Blue Horror, Ulthuan Grey and Ceramite White, getting more gentle and sparing as you move from colour to colour. To provide a neat finish the rim of the base is then uniformly covered in a layer of Baharroth Blue.
8. Your base now resembled a snowy sheet of ice and on a base such as this where there aren't any ruins or extras to break up the whiteness I like to add some tufts of Mordheim Turf. Once this has been put on I will add blood effects (something that contrasts really well with the snow).
And with that the base is done. While this process can be a little time consuming as you wait for the Agrellan Earth and the Nihilakh Oxide to dry; it is really easy to do and creates an effective uniformed look across a collection.