From Destinypedia, the Destiny wiki
- "Required for Infusion and forging Masterwork gear. Chance to recover from Legendary gear."
- — In-game description
An Enhancement Core is an item used to upgrade Legendary gear into Masterworks, as well as for infusion. Prior to Update 2.0.5, they were known as Masterwork Cores. They are obtained by dismantling weapons with the Masterwork rarity, by completing Scrapper bounties. It takes 10 Cores together with 20 Legendary Shards to Masterwork a Year 1 weapon. Additionally, 3 cores can be used together with 10 Shards to reroll the stats of an already Masterworked Year 1 weapon.