You can no longer buy them to use for upgrades. Instead, any leftover stacks in your inventory can only be "sold" to at the Tower for small amounts of Glimmer. Historical Context and Usage
In modern Destiny 2 (post-Season 19), planetary materials like Helium Filaments have been deprecated. helium filaments destiny buy
: They were primarily used to upgrade the perks of Legendary and Exotic weapons and armor. You can no longer buy them to use for upgrades
While you can no longer buy them for functional use, they remain a nostalgic symbol of the Moon's "grind" for veteran Guardians. : They were primarily used to upgrade the
The exchange rate was typically for 20 Helium Filaments . Destiny 2 (Pre-Deprecation) :
In their prime, Helium Filaments were more than just a currency; they were the "fuel" for progression.
: In Destiny 2: Shadowkeep , players could use them to play a physics-based mini-game near Eris Morn on the Moon, which could even grant a hidden Triumph.