Cerulean Lulamoon-Spark (ceruleansparkold)'s status on Tuesday, 09-Aug-11 08:09:17 UTC
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@sparklepeep My personal explanation of Unicorn magic is that everypony has magic, but can't project it outside of themselves, unassisted. Pegasi use it for their oddly inertialess flight and gravity-defying hovering. Earth ponies use it for their legendary endurance and strength. Pinkie uses it to...be Pinkie Pie. For Unicorns, the horn is essentially a conductor, so blocking magic at the neck would stop them from casting because the horn wouldn't have access to any reserves....but that doesn't have anything to do with the story, which I admittedly haven't actually read.
