Based on an extensive comment by Voxxel in the Wowhead comments: * 25 levels of Knowledge that you can research, each level adds a specific multiplier to your Artifact Power gains. * Start with Hitting the Books at level 110 in your Order Hall which begins the process of starting Artifact Knowledge Work Orders. * Each Work Order costs 500 and produces . * The first work order for Artifact Research Notes takes 5 days to complete. The required time changes proportionally, based on how far the character is in the research progress and how much time passed since the launch of Legion. The exact numbers of this catch-up system are not known. * Using an increases your Artifact Knowledge (and level which increases Artifact Power gains) * With each used you advance in presen