Originally Posted by
Turtel
No, Artifact Knowledge only affects one character. It takes 5 days to level up your Artifact Knowledge if you're leveling it consistently from the beginning of the expansion. But if you make a new alt a few months into the expansion, it will only take that character 1 day to level up, until you catch up to everyone else. Since Artifact Knowledge boosts Artifact Power gains by so much (exponentially increasing amounts), it basically makes all those months and months of AP grinding prior to the present obsolete; the vast majority of your Artifact Power will come from the last couple of weeks of AP grinding (when you had the highest Artifact Knowledge).