MLP infection AU. The Hendren Virus

A My Little Pony Infection AU. I'll give you some spoilers if you don't want to read. So basically a Tree called the Hendren tree was going extinct when it adapted to produce airborne seeds that latched onto animals and infected them. Then they would be taken over and mutate and then when the virus matured either they turned into tree based off how they were physically or they turn into spewers which spew seeds that grow into trees. The infected are very dangerous and deadly.