MDV item

[Alex Koponen]

Does an item that grants an MDV bonus to its wearer grant the bonus such
that the new, higher MDV responds as the wearer desires (stopping harmful
spells and assisting helpful spells) or is the additional MDV always
against any spell affecting its wearer, even healing and other helpful
spells?

  Perhaps it is on a case-by-case basis. Of course the Referee has the
ultimate last word, but many Referees would like guidance for what should
be the standard way MDV items work around helpful spells.