[RM2K3] "CURSED" GEAR?

I know you can have weapons that give a negative to some stats, but is there a way to make having a weapon or piece of armor that lowers the Max HP or MP or gives a negative status to the wearer? I've been fiddling with common events to get a weapon to lower the user's Max MP and it either completely drains MMP to zero or doesn't affect it at all. The closest thing I can find searching around is a thread Darken answered about Debuff skills last year.

Thank you! I knew there was a way.