Status Updates From The Silmarillion

And so, the Noldor pass into Middle-Earth after stealing the ships of the Teleri; Doraith is founded, with Melian creating her enchantment to protect her (and who prophesies one mortal man who will pass the Girdle of Melian); the sad story of Aredhel, Maeglin and Idril is told, alongside the fall of Beleriand, where finally, Sauron appears…

I don't think you understand how fun this book is so much whimsy