Yeah what he said. Fountain of Youth exists, nothing else.
Now that aging hour restrictions are gone, not sure there's any use for a different scroll regarding losing some years of your age (only for RP purposes i guess).
For RP purposes they would be amazing tbh and it would be cool if the Fountain of Youth also reduces some years if a noble uses it or something, or helps them heal or something?
But being able to trim down 20 years with a scroll, that would still be awesome. Maybe not for game mechanic reasons, but definately for RP reasons.