You must have Inscription and 'Darkmoon Card of the North'
1) Get about 400 gold to start with
2) With that 400 gold buy as much Icethorn as possible, if no more can be bought move to Lichbloom
(the reason I choose Icethorn is that overall there I have had much more Icy Pigment drop than from Lichbloom assuming equal amounts of each herb)
3) Mill all herbs and process the Parts
4) You will also need Eternal Life which are very inexpensive, and Parchment, with your Mats make as many cards as possible, feel free to get more snowfall ink for 10 ink of the sea, unless ink of the sea is your limiting ingredient or will become so in this transaction
5) What ever card you make, put it on the AH
6) With the money you make, repeat these steps to exponentially increase your gold ( i went from 300g - 17kg in a day, because of 4x 6 of nobles, and countless other ones)