It's a song they sing on My Little Pony, in order to summon the Anti-Pony, harbinger of wilted fields and cold barns, who will bring on the Pony Apocalypse.
Sorry to bother you again, Ryzen. This time's its just a normal reupload request. You might want to update it first to its v1.02, if you're not too busy. 炎のおっぱい異世界 おっぱいバニー学園