[Gregstrom]

Also, why should curses/horror marks be reversible? IIRC, in Greek mythology once the Furies had marked you for a fall even Zeus had no say in the matter.

In flavour terms, it has always seemed to me that Horrors are from somewhere outside the Pantokrator's sphere of influence. If that is his case, why should any mere mages or pretenders be able to have any say over what they do (beyond bribing them to put their attentions in a certain direction, that is)?