Both Theldren and his gladiators were once members of the mercenary-company The Veiled Blade. After the failed attempt at (completely) killing Lord Valthalak, Theldren left the company with a piece of Lord Valthalak's amulet and some of the other former members to become gladiators for the Dark Iron dwarfs in Blackrock Depths. According to Anthion Harmon, another of the former members of The Veiled Blade, Theldren beat him to an inch of his life when Anthion tried to retrieve Theldren's amulet-piece as Anthion had realised the curse behind it. As such, Theldren is a very violent and egocentric dwarf.