Finding Hollow Knight: Silksong's spool fragment locations might seem like just a nice bonus, but expanding how much silk Hornet can hold is essential as you approach the end of Act 2 and enter Act 3.

You'll need to enter Mosshome via The Marrow's upper left exit, via the passageway above where you find Shakra. Exit the chamber at the far left, drop down onto the platform, and activate the elevator ...