The core part of upgrading gear in Destiny 2 is actual cores, Enhancement Cores that is. Enhancement Cores are necessary for upgrading armor and weapons to build them toward Masterwork quality and give them a stat bump across the board.
While Unstable Cores are used to infuse gear past 200 Power, Enhancement Cores are used for everything. Weapons, armor, and even Ghost shells need Enhancement Cores for you to Masterwork and infuse them. The higher the gear Tier, the more materials you need to upgrade it, so if you’re aiming at Tier 5 drops, make sure you have enough resources.
