[OOC][PLOT][ARC 4] Planning for Arc 4

[robkelk]

Mod note: We've pulled some posts out of the pre-retcon "Planning for Arc 3" and "Planning for Arc 4" threads and moved them to the post-retcon threads, before sending the remaining work -- Black Aeronaut's overall plots, which we've been asked to not use -- to his writing subforum.
----

Quoting from Nabiki Tendo's page on the Ranma Wiki:

Near the end of the manga, Nabiki once helped Akane to grow spores from magic mushrooms, which could control age through digestion, but it is left to fan imagination if she continued to cultivate them for herself afterwards. Turning herself youthful again every 10 years is definitely something she would find useful, as would auctioning them off to billionaires.

So there's one life-extension method to add to the list...