According to Christianity, the devil is God's main rival.

Christianity describes the devil ("Satan") as a snake that entices Adam and Eve to eat the forbidden fruit, and describes him as a "fallen angel". He threatens the world through evil and is the opposite of the truth. He deserves to be condemned. Together with his fallen angel, he burns forever in the final judgment.

Islam, along with all those who oppose Allah, identifies the devil ("Shaitan").

Some non Abraham religions contain characters similar to the devil, such as the Buddhist devil Mara and the Zoroastrian spirit Angra mainyu.