
As you slay your way through Pharloom in Hollow Knight: Silksong, you'll pick up Shell Shards from the enemies you've felled. They're one of two forms of currency you'll find, and at first, they might seem useless next to the all-important Rosaries.
However, that's not true at all. Shell Shards are incredibly valuable, but Silksong doesn't come out and tell you what they're used for. Once I found out, I immediately wanted to know how I could get more of them. Thankfully, I found that out, too.