The Watchers shared several types of forbidden knowledge with humans, as described in the Book of Enoch:
1. **Metalworking and Weaponry**: They taught men to make swords, daggers, shields, and breastplates, which led to increased violence and warfare[3].
2. **Cosmetics and Adornments**: They instructed women in the use of makeup and jewelry, contributing to vanity and promiscuity[3].
3. **Magic and Sorcery**: They introduced charms, spells, and the cutting of roots and trees, encompassing various forms of magic and medicine[1][3].
4. **Astronomy and Divination**: They imparted knowledge of celestial bodies and divination practices[2].
Sources
[1] The Transmission of Magical Knowledge in 1 Enoch - De Gruyter https://www.degruyter.com/document/doi/10.1515/9783110222029.2.196/pdf
[2] The Watchers - Bible Odyssey https://behappyhuman.bibleodyssey.org/articles/the-watchers/
[3] The Benei Elohim, the Watchers, and the Origins of Evil https://www.thetorah.com/article/the-benei-elohim-the-watchers-and-the-origins-of-evil
[4] The Forbidden Knowledge of the Book of Enoch: The Watchers ... https://www.amazon.com/Forbidden-Knowledge-Book-Enoch-Watchers/dp/1578638127
[5] How Fallen Angels Corrupted Mankind With Forbidden Knowledge https://www.youtube.com/watch?v=vIS3ywTfkG4