Artemis

 is a black badge on KA. In our opinion, it is the hardest badge to achieve. So far the requirements for it are unknown but it appears like you need 550 skills mastered. However, people are looking for clues in the HTML. The badge can't be earned at this time. However, a KA user, now employee, named Peter knows how to get it but is not disclosing any details as to how to get it.