Quote Originally Posted by The Glyphstone View Post
Maybe the Draught makes you not 'count' as a Heterodyne anymore? The 50 families have their 'no resurrections' rule, the Heterodynes could have a similar rule exclusive to their family - turning yourself into a monster of some kind removes you from the line of succession. Keeps a limit on how crazy the self experimentation gets, and would be a rule the Castle would gleefully help enforce from its obsession with heirs. Gotta stay capable of breeding the next generation of Heterodynes.

That said, I don't think Oggie is a secret Heterodyne either.
Some of the Heterodyne family crypts going into der Kestle arc have big "Do Not Open" signs on them. Some of them had multiple dates of death. I think a Heterodyne has to be "officially dead" to not count.

Besides, if being a monster stopped you from being The Heterodyne, I suspect there'd be practically nobody in the family who qualified.