Even if you’re not religious, you’ve got to give religions credit for at least one thing: they really know how to scare the living hell out of people. Religious demons often sound more terrifying than anything a human could dream up, which isn't a bad way to keep potential sinners in line.
This list of demons from religion includes figures from many different faiths. Christianity, Judaism, Buddhism—if it’s got an evil demon, it’s probably here. Some of these are familiar, some of them are obscure, but they’re all really scary.
As Lucifer’s right-hand man, Mephistopheles does the Devil’s bidding. He collects souls that have been damned and bargains with those who wish to sell their souls. Mephistopheles comes from the classic German legend of Faust, who sold his soul to the Devil in exchange for infinite knowledge and magical powers.see more on Mephistopheles
Have you ever heard the phrase “I am legion,” signifying solidarity with a particular group? You probably wouldn’t have guessed that the phrase comes from the story of a possessed man in the Bible. Jesus comes across an unnamed man who is plagued by a demon. He performs an exorcism, and in order to cast the demon out, he asks it for its name. It responds, “My name is Legion, for we are many.” Which is simultaneously incredibly badass and incredibly terrifying.
What happens when you have sex with a mountain? If you answered, “Your union creates a race of rock children, duh,” you’re totally right, but you probably shouldn’t be cheeky, because that’s a really weird thing to know. Asag is a grotesque, hideous demon from Sumeria who leads his rock-children-things in battle. He’s so monstrous to look at, according to legend, he causes fish to boil alive.
Abbaddon is a Christian demon whose name means “Destroyer.” Abbaddon rules over a bottomless pit and commands an army of locusts to torment anyone who does not have the symbol of God on their forehead. Better get on that quick if you don’t want to be attacked by locusts.