Nikki has provided 4 lovely sketches to work with, but I don't need much of a prod to make a triangular card, as it's quite a challenging shape to work with and they can look quite striking. The obvious association at this time of year is with a Christmas tree, but I wanted to make something a little more ambiguous, so I started with a silver card blank and made a mountain that might be a stylised tree. I added a snowy top, using some Anita's glitter paper that is quite fabric-like in how it feels. I wrapped it around all 3 sides, as I think it makes a big difference to the finished project to decorate the whole pyramid with this type of card blank.
For the straight element from the sketch, I've used a trio of snowman dome stickers from Papermania's ancient history, and for the curvy element I used an even more ancient See D's stamp and then drew a scarf around it. A blue star and some snowflakes (again on all 3 sides) finishes the card off.
I hope you like it!