Edited:Just noticed, my tutorial ever posted so here it is.
First cut a piece of watercolor card to size.
Then scribble the Spectrum Noir Aqua markers onto a stamping mat or acrylic block. This card uses Moss and Navy.
Stamp the tree stamp in to the ink and on to the card.
Using a waterbrush, blend the color so that it is not quite as blotchy.
Add some shading around the trees using Slate.
Optional: go around the outline with a fineliner just to give it a bit more detail.
Cut the image down to size and layer it onto black card.
Layer the image onto the card and add a die cut sentiment. Finish it off by adding some snow and glitter
Pop over to the Spectrum Noir Blog for more inspiration.