Lampmaster can be found for the second time in Clair Obscur: Expedition 33, by going to the Painting Workshop. This is a late-game area, which you can access by unlocking Esquie’s flying ability and exploring the content. Yes, quite naturally, the boss is much harder, since it’s in can be found during the late-game.

Given that it’s entirely possible that Clair Obscur: Expedition 33 may have just become one of my favorite games of all time, it took about all of two days before I couldn’t resist heading back into it for a New Game+ run. I just finished it up and if you’re wondering if it’s worth it, I can tell you how it goes. Spoilers follow.