A new infection has swept by Ponyville. Here's the information we currently have: The Butterfly Sorrow Curse only has 1 stage. it is very very contagious, but it is not violent infection. some hosts made die within a few minutes after getting it. it comes from a vine call the Hitchhiker Vine. The symptoms are: Migraines, irritated eyes, butterfly wings growing out of the host's back, vision becomes blurry, loss of hearing, always tired, and bleeding from the mouth.