
Unstable Cores are a new item in The Edge of Fate, Destiny 2's latest expansion. This controversial currency was required to infuse weapons and armor beyond 200 power. Though the resource is fated to disappear in the future, Bungie gifted guardians 777,777 Unstable Cores to use until then.
The newly minted Unstable Cores are integral to the leveling process, at least for the time being. If you're a new or returning player who doesn't know what to do with your lifetime supply of green rocks, here's a quick explanation on how they work, how to use them, and why they're going away.