Before You Can Understand The Eternals, You Need to Get to Know Marvel's Deviants 3 Shares We'll be meeting the mysterious Eternals soon with director Chloé Zhao's The Eternals rolling out for another widely anticipated chapter in the Marvel Cinematic Universe. Here's the basic idea: the Eternals are essentially a flawless and virtually immortal species that the ancient Celestials developed alongside humans. But in the original Marvel comics, the Celestials also created a third species: the Deviants, who more or less became the Eternals' enemies. Ahead, we'll give you a primer on the evil Deviants, breaking down everything you need to know about them before you tune into