The Feeding flaw “Methuselah’s Thirst” on page 181 says “Your hunger can only be fully slaked by the blood of supernatural creatures…otherwise, it remains constantly at a minimum of 1.”
Does this replace the usual rule where the only way to “fully slake” hunger is to drain and kill a human being? (p.212) Do they stack? If so, is your hunger dice floor at 2 until you find someone supernatural to drink from? Or do you have to drain a supernatural creature to death to lose your last hunger die?
Best Answer
Yes, this replaces the rule where you can only get to hunger 0 by killing someone. Since Methuselah's Thirst therefore supersedes the normal limitation of "draining a human" there is no stacking involved. Luckily there is also nothing about draining in the flaws text, meaning that you don't have to kill a supernatural creature to sake your hunger (Which, with the current meta would be deadly, I'd say).
But: In the flaws text it also says: "[..]it remains constantly at a minimum of 1. (Or higher, depending on Blood Potency (see p. 215)." [V5, p. 181]
So, blood potency still applies with this, meaning you have to edit the table on page 216 a bit to fit your needs. The first real change to your minimum Hunger applies at Potency 5 ("Must drain and kill a human to reduce Hunger below 2", [V5, page 216]). So, if you're old enough you're stuck at 2 - or later 3 - Hunger if you don't drink from a supernatural being.
It doesn't matter if you kill a human at all, you don't gain anything from doing so...Though, admitedly, if you're at Potency 5+ you also slake less Hunger per human, so you might need to drain them to gain anything from them at all...