Night Mother's Gaze is part of the base game. Crafting stations are located in Reaper's March (Old Town Cavern), Bangkorai (Silaseli Ruins) and The Rift (Eldbjorg's Hideaway). You need to have at least 6 traits researched (per item) to be able to craft this set. You can craft the set in any motif style that you know, and you can trade the crafted item pieces to other players. Each set piece becomes bound on equip.