CHOICE

The king cobra is one of the world's most poisonous and smartest snakes. It's Latin name, Ophiophagus hannah, literally means 'snake eater', hinting at the 20-foot-long reptile's favorite meal. Arbitrio is a leucistic king, not normal by any standards, and in the house of Black, not normal is a death sentence. So why is he the prince of Slytherin's trusted pet?