Time and time again, Equestrian magic has proven to be dangerously unstable in the human world. SciTwi realizes that if she wants to study magic safely, she needs another source of arcane power.
So she decides to steal Christmas Hearth's Warming.
Naturally, Sunset is on board.
Many thanks to GaPJaxie for the story idea, and to The Seer, The Legendary Bill Cipher, and Limonene for pre-reading and editing.