"weapon upgrade core": Can be used on common through rare weapons. They could be attained from dismantling maxed Legendary weapons. "Attach this weapon upgrade core to a weapon to increase its general potency" "armor upgrade core": Can be used on common through rare armor. "Upgrade armor with this armor upgrade core to boost defense and statistics". For weapons: Common -> Uncommon (+atk, +optic/ballistic, +element if not a primary) -> Rare 1 (+atk, +optic/ballistic, +stat mod tree) -> Rare 2 (+atk) -> Legendary (+atk, +perk) For armor: Common -> Uncommon (+dfns, + 1 stat boost) -> Rare (+dfns, +perk, + 1 stat boost -> Legendary (+dfns, stat boosts increased by [10?]%, +perk) Armor could upgrade similarly, going from Common -> Uncommon -> Rare -> Legendary, perks unlocking along the way based on what type of gear it is. I guess I just really miss Polite Denial 0/1 and Evergreen II.i, along with all those rare armor pieces that have great stat rolls. As you gain upgrade cores by dismantling maxed Legendaries (or via other sources- possibly Rare engrams, strike finishes, and Nightfall rewards), it would take four of these cores to upgrade, for example, Khostov 7G-02 to legendary status. One or two to upgrade a capable rare to legendary status. This would multiply the weapon sandbox sizes we see in both PvP and PvE, and once a weapon is upgraded to legendary status it can of course be rerolled. Personally I'd love a Khostov with Focused Fire, Extended Mag/Flared Magwell/Rifled Barrel, and Counterbalance. What would you want? [[url]https://www.reddit.com/r/DestinyTheGame/comments/36mnjx/how_reforge_guide_possible_perks/[/url] for reference] Also- Autos and Fusions still need buffs. Autos moreso of course.