Maybe a blind spot is an empty spot, and an empty spot on a head = bald spot? Hair would be a presence, not an absence.
Presumably when one reads a book under the Interdict of Merlin, one reads blank pages, not mildly obscene limericks about a man from Nantucket.
I think a sensible wizard would cover any blind spot they create with something very ordinary, if this is possible.
Maybe a blind spot is an empty spot, and an empty spot on a head = bald spot? Hair would be a presence, not an absence.
Presumably when one reads a book under the Interdict of Merlin, one reads blank pages, not mildly obscene limericks about a man from Nantucket.
I think a sensible wizard would cover any blind spot they create with something very ordinary, if this is possible.