“Yet he (Maglor) yielded at last to the will of Maedhros, and they ..., laid  hands on the jewels. ...Each of them took to himself a Silmaril, for they said: “Since one is lost  to us, and but two remain, and we two alone of our brothers, so it is plain  that fate would have us share the heirlooms of our  father.” 

This is where it all began. 

 Maedhros and  Maglor meet strange creatures from another world...