It is unknown whether exalted is required, or if that was just the circumstance associated with that particular drop.– Artifact Knowledge level 5 required One of the bindings drops from Dargrul in Neltharion's Lair and the other binding drops from Ash'golm in Vault of the Wardens.– Artifact Knowledge level 5 required Seems to be a zone wide drop from Suramar nightborne mobs (including the fal'dorei (the nightborne that were turned into spiders)).There have been several reports of it dropping from a rare spawn, and a couple reports of it dropping from a normal mob. – Artifact Knowledge level 4 required Supposedly requires the Tier 2 Order Hall Teleport trait.
She will kick you over to a Felbat, “Downfall,” defeat him and claim your new hidden skin.Below is all of the information that we know of so far; it has been compiled from various sources including these forums, Wo Whead, and Reddit.As I did with the original thread, I will continue to monitor and update this post as more information becomes available.The skin has a chance to drop from one of the treasure chests at the end of the scenario, so open as many large chests throughout the scenario as you can to try and get the keys that will unlock the chests in the final room (the room you get ported to after the timer expires).Shaman– Rare drop from bosses in the Eye of Azshara dungeon.In your Order Hall near Juvess the Duskwhisperer.3. The other half has been found as a drop from Hyrja inside the Halls of Valor.The person who received the drop was already exalted with Valarjar.Once a day in your class order hall, you will have a chance to read an emote referencing your portals.The next portal you take will displace you to a special phase in Frostfire Ridge where you can acquire this hidden skin.– Artifact Knowledge level 4 required Archivist Inkforge asks you to search for twelve tomes that he has lost around the world. The beta community has collectively found all twelve tomes. Karazhan – Immediately after The Curator on the right hand side of the Guardian’s Library. A drop from Artificer Lothaire in Moon Guard Stronghold in Suramar.Once all twelve are found, simply take them back to Archivist Inkforge for your new hidden skin! From Archivist Inkforge himself in your Order Hall.2. – Half of the item is purchased from the Valarjar Quartermaster at Exalted reputation.The quest requires you to gather thirteen "Skull of the Executed", which seem to drop from the elite rare spawns that can be found throughout the Broken Isles.Generally the Wardens will target one or two each day as a world quest.– Similar to the Blood Death Knight hidden skin, there have been reports of people acquiring this item from the chests at the end of the Withered Training scenario in Suramar. In the library section of the church in New Hearthglen in Dragonblight.9.