The Edge of Fate expansion overhauled multiple core systems in Destiny 2, including Power leveling. Now, your weapons and armor can go from 10 Power all the way above 400, and you need Unstable Cores to ensure your gear is up to Power.
Unstable Cores are a core part of the Power leveling in Destiny 2, so here’s everything you need to know about them, including how to get and use them.
