@UncleSpaceman
1) Clearly you never read the manga, or you're being dishonest by not providing the full context. Demise is nothing more than a statement with no reason to take literally. An Expression. And they were just describing how Hylia used the sword to create and raise Skyloft
2) As Shad pointed out, what the mask was used for is completely irrelevant
3) Now onto Faron...
[This] is the calc the entire feat (amoung many other Zelda feats) are completely dependent upon. To summarize for those who might be confused, the assumption is that the sliver of sand in Lanaryu makes up the entirety of the Sand Sea Link sails across in SS. Scaling the area of that section of sand to the smallest sea IRL, the Sea of California, the author then works backwards from the Square Law to eventually find the diameter of Hyrule, which became the basis for nearly all major Zelda feats outside of Majora's. However, there is a very crucial flaw with this calc...
In
[this] video (20:53), you see the completed map of the Lanayru Sand Sea as it was before it changed into a desert. Note how the sea looks
NOTHING like how it's presented in the map found in the calc. That's because the calc's map, to which the entire area of the Sea of California was attributed, depicts only a mere
FRACTION of the full sea. Because over 90% of the real sea map was not shown, Link
MUST have sailed a distance that extends beyond the borders of the calc's map, and as a result we must not accept that the little chunk of sand in the calc's map represents the actual dimensions of the sea
In short, you simply
CAN NOT say that the map in the calc accurately depicts the Sand Sea. While it isn't unreasonable to say that the full map of the sea has an area equal to the Sea of California as a low end, the fact remains that this calc, by misrepresenting a fraction of the sea as its full size,
GREATLY OVERESTIMATED HYRULE'S SIZE. Therefore, this calc must be discarded and by extension, the calcs for Faron, Levias, Skipper, the Ether Medallion, and every other Zelda calc that relied on it