Master of doom, doom mastered
Niënor Níniel, Túrin's sister's words for Túrin when she thought him dead. From the great tragedy of The Children of Húrin.
The phrase's translation is provided on the same page:
"Master of doom, by doom mastered."
A literal translation (with the same word order as Quenya) would be:
"Oh Túrin master of doom, mastered by doom."