Havoc Demon Hunter Legion Artifact Boost - Buy Twinblades of the Deceiver Artifact Appearances
Wowhead - Artifact weapons in Legion will have traits you can unlock via Artifact Power, as well as "Relic slots" which determine raw stats and perks. Relics will be from traditional sources
A new look at the Hunter Artifact Weapons in Legion | Eyes of the Beast
Artifact - Wowpedia - Your wiki guide to the World of Warcraft