More "Token" Items [Dragon Head, Dragon Egg, etc]

I'd love to see more items that don't have a function- but are very rare and hard to obtain.

Say, after raiding a woodland mansion, you collect a Vex statue.
Another example would be after raiding an ocean monument, you could collect a treasure chest.

This would be a good physical representation of your adventures, as well as a good display piece.
It's always nice to be able to recognize your progress.