Lore Analysis: Do Princess Dream of Magic Sheep? (S5E13) · 8:09am Jul 15th, 2015
HEADCANNON WARNING
ITS CANNON! Magic taking a strain on unicorns (even freaking alicorns) is now cannon. An argument could be made that this was already proven during "Boast Busters"... but hey telekinesis doesn't follow the same rules as magic, mainly because it is something that unicorns are born with, not learn.