How to Use Unstable Cores in Destiny 2 Unstable Cores are used the same way as Enhancement Cores in Destiny 2 — they are used as materials for infusing equipment.

A breakdown on how to use the new Tome of Want in Destiny 2 Episode Heresy and how to find Essence of Desire to use for it.

Destiny 2: The Edge of Fate introduces a new upgrade system which employs a material for post-level cap upgrades.

Fortunately once you've learned the tricks to Destiny 2's tonics, and how to unlock new recipes, it's less bewildering than it might initially seem.