Blizzard has published a blog detailing the new gear item upgrade system coming in Dragonflight Patch 10.1: Embers of Neltharion! This system represents an exciting new opportunity for players to build up their items, offering more options and greater availability of hard to get pieces of gear, which we've also covered in our We have also covered this system in our own Item Level Gear Upgrade Guide, so if you're still wondering how Flightstones and Aspect’s Shadowflame Crest's work, or where to find upgrade vendors throughout the Dragon Isles, check it out for more info! Item Level Gear Upgrade System — Flightstones and Crests in Dragonflight 10.1
Dragonflight Season 2 introduces an all-new way to upgrade your gear with a new upgrade system. This system will replace most of the upgrade systems that are in place, including Valor and Storm Gear.You’ll be able to optimize your gear by upgrading almost any item you earn during the season, whether you earn it from a World Quest or Heroic Aberrus, the Shadowed Crucible.New Upgrade CurrenciesThere are two new primary currencies you’ll gain as you make your way through the latest content available: Flightstones and Shadowflame Crests. Flightstones can be earned from doing quests, found in treasures, and many other activities.
You’ll be able to have 2,000 Flightstones at a time during the season, but there’s no limit on how many you can earn (and spend!) in a week. Shadowflame Crest Fragments are available in four varieties, depending on the difficulty of the content they come from, and can be earned in a variety of ways.
Read more on wowhead.com