Polarized Fractaline

Polarized Fractaline were a consumable only available during Season of Dawn and owners of the SoD Season Pass used to upgrade the Resonance Rank. Fractaline was obtained from The Sundial Arena, Saint-14 Bounties, and Season Pass rewards, but later on was obtainable from Gambit, Crucible, Vanguard Strikes, and Generated Fractaline Harvests from The Tower Obelisk.

A community Co-Op event known as the Empyrean Restoration Effort or the Empyrean Foundation used up more that 7 billion Fractaline to power the Sundial's core, now inside the Tower Obelisk. This allowed a new area known as "The Lighthouse"* to be built using the Season of Dawn Artifact at the Caloris Spires. The Empyrean Foundation ended on February 26, 2020.

*Note that "The Lighthouse" is NOT The Lighthouse found in Destiny 2's expansion Curse of Osiris.