Master card

[evikour]

If I am a Master Wizard and decide to discard the Wizard and become Bard, do I lose the Master card?
If I am forced to lose my Class by Curse/Bad Stuff can I keep the Master card if I replace the lost Class at once with another/the same one?
I guess the answers apply respectively to the cards High and Dark as well..

[MunchkinMan]

All of those cards say in their text, "It is lost if that Race/Class is lost," so they would always be discarded with the Race or Class when the Race or Class is discarded, regardless of why you discarded the appropriate card.