Indie Fantasy - Group of non-humans set out to find a crystal, end up getting lost in a snow storm and finding a caning occupied by a large wolf. Spoilers??

[Sage]

I know that at one point, the exiled goblin prince goes back to his home and ends up dying. The name was ‘xxxx and the journey for the lost crystal’ and there was (I’m like 95% sure) a unicorn on the cover. I found this book in 2020 in a donation bin while I was in an institution and it was relatively old. It looked self published and possibly bought on Amazon? It was the 2nd or 3rd book in a series.

[Capn]

A few pot-shots, if you haven't rediscovered it yourself in the meanwhile!

Forbidden Power: The Secret of the Lost Crystal
THE LOST CRYSTAL OF LEN : The Lanterncup Series
The Last Crystal

I know none of those fit your given title format. Not having much luck there. :(