Hi everyone!
I'm trying to unlock all the achievements and I can see there is one for getting a lump of coal from The Gift That Keeps On Giving. I have seen a bit over 600 different outcomes and I am close to seeing half of the secret endings, and yet the coal doesn't seem to ever spawn. Also, the wiki states that there is also a couple of stats modifiers that I have never seen yet, either. The Fandom wiki doesn't say there is anything special about these items, and I can't find any other info online about a possible requirement for them to appear.

Do you know if they are related to the DLC? For now I only have the base game. Or could they maybe be a seasonal thing?

Thanks!

EDIT: Solved! See below.