I get it, I have titanium plates with seed stamped on it, it will survive fire, collapse of the building, floods, corrosion... but its very hard to keep it safe (even burried deep underground from metal detectors) and then move it in case if you have to flee and cross the borders naked.
What Iam thinking about is easy to remember phrase which will be very complicated to guess. Something like
and convert it to private key **in user friendly way**. Is this possible?
I know its not perfect, but this kind of stupid sentence is easy to remember (easy to imagine and recall from memory) and very hard to guess even for computers.