Lol damn, how did I manage to miss this! Thank you for the quote! :D
"But that might be just her understanding. Maybe the Dial can transfer years from someone with a longer remaining lifespan to someone with a shorter one."
That could make sense too (it would still be going only in one direction), but I don't think it's the case because she's reading from the book from the Netherworld. It's not a direct quote, but I think she's just rephrasing, not interpreting, so I'd say 'older to younger' is indeed impossible.
So yeah, in the end the rules are just not directly transferable between the novel and the drama, and I like that they didn't even try, they just made up their own ~rules~. :D (Which are not rules at all because who even knows how the Hallows work, but that's a feature, not a bug. :D)
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"But that might be just her understanding. Maybe the Dial can transfer years from someone with a longer remaining lifespan to someone with a shorter one."
That could make sense too (it would still be going only in one direction), but I don't think it's the case because she's reading from the book from the Netherworld. It's not a direct quote, but I think she's just rephrasing, not interpreting, so I'd say 'older to younger' is indeed impossible.
So yeah, in the end the rules are just not directly transferable between the novel and the drama, and I like that they didn't even try, they just made up their own ~rules~. :D (Which are not rules at all because who even knows how the Hallows work, but that's a feature, not a bug. :D)