Chapter 4 — Subterranean
Lunafilament Locations — Ch.4
Total 4 lunafilament across 1 location in this chapter. None of these are missable if you backtrack from the next chapter's first save room.
| # | Location | How to get | Count | Spend on |
|---|---|---|---|---|
| 1 | Phase pocket | Use EMP to reveal the platform | 4 | Crit Chance II |
Tips for Ch.4
- Run the Ch.4 walkthrough alongside this list — the routes are timed for collection.
- Convert lunafilament at the next save terminal — the upgrade priority list tells you which stat to buy first.
- See the full all-chapters lunafilament index for cross-chapter totals.