One month later, on March 10, 2017 Pillorian released their first full studio album, Obsidian Arc. The album received mixed to positive reviews. Sputnik Music gave the album a rating of 5 out of 5, or "classic", and alluding to a lyric from one of Agalloch's songs, summarized its review by saying that "if this grand panorama before me is what you call god... then god is not dead." Decibel magazine gave the album an 8/10 review, calling it "categorically black metal" and "darker, edgier and far more dissonant" than Haughm's previous work as the frontman of Agalloch. Metal Injection called the album a "somewhat promising start", but said that the album was too safe and that despite being good, "seldom [veers] towards being great".
