From Destiny 2 Wiki
|Description||Recovered from dismantled Masterwork gear. Can be used to upgrade a Legendary item into a Masterwork.|
How to Obtain
- Dismantling a Masterwork Weapon yields 1 to 3 Masterwork Cores.
- Upgrading Legendary Weapons to Masterwork Weapons.
- 10 Masterwork Cores are required to upgrade the weapon.