New Merchant : Mystery Merchant (revamped for dungeons 2)

In Minecraft Dungeons 1, I never really used the mystery merchant. he always just sold me overpriced garbage. I think that with different villages in Minecraft dungeons 2, he could prove really useful. I think that he could do a two possible things:

1. He moves between villages randomly, and sells his secret items, so when you find him it's special.

or

2. He has a stall that only appears at night, in a hidden area of each village (Like Kilton in BOTW).

I think that adding a merchant that is not around all the time would be interesting, and if he could sell some secret items that you can't find anywhere else. He could also have mystery boxes, but I would propose that they get more balanced because they were too weak and expensive in Minecraft Dungeons 1.