Alpha

"And once they kill everyone in sight, that's the time that you know that you screwed everything. Because once they kill all those people, they feel their power drained and their thirst to regain their former power increases. Consumed by this thirst, they then begin devouring those humans that they killed one after other. All the friends who tried to save them, the ones whom they loved, the one that they cared for, they all become their prey."