Dah'mir spent decades cultivating a tribe of humans in the Shadow Marches, the Bonetree Clan, who worshipped him as a god-like entity. They referred to him as The Revered, and followed his edicts without question.
When a group of Kalashtar, consisting of Kalshana, her cousin Medalashana, Tetkashtai and Virikhad arrived in Zarash'ak via ship, Dah'mir was there to meet them. He claimed to be a scholar of Sarlona, and then kidnapped them. Kalshana escaped, along with Virikhad, though Virikhad was eventually recaptured. Tetkashtai escaped on her own, and later joined up with Geth, Natrac and Singe.
Dah'mir had plans for the Kalashtar in Sharn, but was ultimately thwarted and killed by the Mist Walkers.