Since the return of the Cowplant to Sims 3, I've been wondering how this can be put to use in a legacy.
Perhaps the cowplant can be used to choose the heir. Shut them all in a room with it when the youngest "comes of age" (teen or young adulthood - you decide), and let it pick them off one by one, until only one survives (kind of like "survival of the fittest"). This creates an option for those who can never decide on their heirs, and who like lots of ghosts.
This could be used with the Apocalypse challenge to make a pretty twisted background story. It could be called "the Cowplant Restriction". It gets lifted after a second family member has reached Master Gardener, thus gaining the secret knowledge required to feed the Cowplant without any more Sims getting eaten.











