I'm not sure if this is already somewhere, but I cant find it... I found a few items while exploring and when i checked them out in my Relic Inventory, they say "Give to Elf". the problem is I can't figure out what this 'Elf' is and how to give him the items...

You encounter the elf randomly while exploring! If you have the right items, you'll automatically trade them for a snowflake.

That makes a lot more sense than Montak's Antiquities that I thought it was!