A In a word, vampires. There are two branches of Night-Children, but both stem from Notte, as he was the first. More, made by One of Notte’s “first-born,” Terrance is Notte's assassin. More. While usually, only those humans who can handle the transformation are chosen, in this case, something went wrong.
Brett grew bitter over his transformation, but instead of seeking help or a healthy outlet, decided the answer was to try to expose the magical The Mythos refers to six of the Seven Peoples of the Earth, i.e. the Sun and the Darkness, the Guardians... More to the world. He did this by attacking children in a public place, counting on live-streamed social media to get the word out.
Terrance himself hunted Brett down, and it was an ugly end.