This halberd can be found at Dandera Selaro's residence in Ald'ruhn. She is outside, selling her wares at the stall near the front door. Stealth must be used to unlock the door (requiring 50 Security) and enter without being detected. Once inside, there is nobody present and it can be stolen without fear of being caught. Only a portion of it is in plain sight, it is mostly hidden behind the bed and locked closet.