“You aren’t going to learn what you need from the ponies you have,” Deadlight said, matter-of-factly. As though what Dorothy had said had made complete sense to him, though Melody knew he hadn’t learned most of the words she had used. “Whenever they’re trying to come up with a cure for something, they always get ponies from all three tribes. I don’t know exactly… but there are differences. Between them.” He switched to Eoch. “If we’re lucky they include thestrals or zebras as well, but often they don’t. Just mix us in with pegasi and earth ponies.” He switched back to accented English. “If you want to find your cure, you’ll need all three types of pony.”