What rare impossible/illegal items existed through older versions that would be worth getting in an “evolution” world? /u/_cetera_ Minecraft on reddit

I was thinking of turning my beta world into an “evolution” world where I update to each version after I finished exploring everything new added in the previous version. Then I remembered that it was possible to get mending and infinity on the same bow before these enchants were made incompatible with each other, so Im wondering what other now unobtainable items could I get? Maybe I could build a museum for them, expanding it in each version (depending on how many of these exist)

I was thinking of turning my beta world into an “evolution” world where I update to each version after I finished exploring everything new added in the previous version. Then I remembered that it was possible to get mending and infinity on the same bow before these enchants were made incompatible with each other, so Im wondering what other now unobtainable items could I get? Maybe I could build a museum for them, expanding it in each version (depending on how many of these exist)