There is one weapon, once you found that and read the name and description you l know what to do. You probaly just haven't found that weapon, it is in a more hidden area in the snow region.
I had it already, but I didn't look at the description. That you need to equip it is not that obvious - normally things just work if you have the prereq items. But the hidden item is just a joke?
You need to be in a specific form and then interact with the blue orb.
Now I see why that form triggers a bad end when you have dragon already. Also dragon and lamia should have some reaction from the orb when touching again.
BTW, don't forget to check my save file in regards of the Frozen Tundra MFs. I did find one at the Hidden Fields at least.
