With Unbreakable Vows, the… arbitrator?… sacrifices a portion of their magic permanently yes? One issue is that, after you die you might need that magic for something, like the more magic you have the more pleasant (or less!) magically created heaven is. In any case, even if magical society was fine with sacrifices, they might reason thus, and not use unbreakable vows. Such a society would make investigation (magical!) into potential afterlife a top priority, so lack of use of such a ritual might be compensated by finding out there is a heaven (or hell).
This is a society that has no problem using dementors as prison guards. I’m sure they would be willing to compel each criminal to act as the binder for one other criminal. It seems like a very small price to pay.
With Unbreakable Vows, the… arbitrator?… sacrifices a portion of their magic permanently yes? One issue is that, after you die you might need that magic for something, like the more magic you have the more pleasant (or less!) magically created heaven is. In any case, even if magical society was fine with sacrifices, they might reason thus, and not use unbreakable vows. Such a society would make investigation (magical!) into potential afterlife a top priority, so lack of use of such a ritual might be compensated by finding out there is a heaven (or hell).
This is a society that has no problem using dementors as prison guards. I’m sure they would be willing to compel each criminal to act as the binder for one other criminal. It seems like a very small price to pay.