From Demihuman Deities:
Nearly 6,000 years ago, circa - 4400 DR, on Midwinter night the longest, darkest night of the year-an army of duergar and drow poured forth from the Underdark and overran both the dwarven realm of Sarphil on the southern shore of the Moonsea and the Elven Court at the heart of the great forest of Arcorar. The Dark Court Slaughter claimed the lives of countless elves and dwarves, including most of the assembled leaders of the Fair Folk and the Stout Folk who had come to the Elven Court to reestablish their long-standing alliance. Among the fallen was the family of the archer-guard Shevarash, once a carefree hunter of the Elven Court. In an anger-tinged prayer to Corellon, Shevarash vowed to become the Seldarine's hand against the drow to extract revenge for the loss of his family. The grief-stricken warrior swore a grim oath neither to laugh nor smile until the drow goddess Lolth and her foul followers were destroyed. It was a tall order, but for the remainder of his life,
Shevarash became the deadliest nemesis of the drow, raiding their underground cities, slaying their priests, and destroying shrines to their foul gods. Shevarash was finally slain by a horde
of myrlochar (soul spiders) after killing the high priestess Darthiir'eigg Aleanrahel and six of her consorts, circa - 4070 DR.
Upon his death and with the assistance of Fenmarel Mestarine, Shevarash the Black Archer underwent apotheosis to become the Night Hunter and the Arrow Bringer.