Gadreel

Gadreel is described in the Book of Enoch as a fallen angel and one of the Watchers. He is associated with bringing forbidden knowledge to humanity. According to this tradition, Gadreel taught humankind how to create and use weapons of war, including swords, shields, and armor. He is also said to have encouraged other angels to mate with human women, an act that led to the birth of the Nephilim.