10 Most Terrifying Villains In DC Comics
4. Sethe
In the same way that Swamp Thing is the avatar of The Green, and defender of plant life, Sethe, the Lord of Storm is the avatar of The Rot (or The Black) and exists to spread decay and entropy.
Sethe's body is a mass of rotted flesh and protruding bones, and a supernatural force of decay follows him. He sits on a mountain of corpses in the center of the Deadlands where The Green is weak, surrounded by his zombie hordes, who all share his hive mind consciousness, and who fight to destroy The Green and spread The Rot.
He caused every major plague and pestilence in history, and would have destroyed all life long ago if not for the guardians of The Green like Swamp Thing keeping his power at bay.