Note: the whole series is not completed and published yet so as of now there are just two seperate series and for now the second paragraph does not apply. One of the first in a series of eleven caches, can be done as a series or just a normal cache. In this container you will find a key and a piece of the coordinates to the "Frozen tree final" cache. Find all of the "Frozen tree" caches (1-4) to complete the coordinates and move on to the next stage!
To finish the entire series you will also need to complete "Rain bird final" puzzle cache, along with the four "Rain bird" caches that lead up to it