Dior is the first hybrid Elve who lived in the middle world of Toliken. Dior was born in 470 of the first age. Dior became the king of Doriath after his grandfather was killed. And Dior restored the kingdom of Doriath to its former strength and wealth. But then Feanor's sons attacked Doriath. Dior died in this war. And the city of Doriath was destroyed.
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From @manyasli