If you are upset it doesn't turn you into a Draenor Ancient, don't despair! Urtumblüte, from Yggdrel, just south of Karabor in Shadowmoon Valley, does in fact turn you into one.
If you acquire the Verkleidung eines Astsassinen and later decide you don't want the Lumber Mill (and subsequently replace the building), you'll still get to keep and use the Guise.
Currently, the tree you turn into can be Skymirrored: simply use the Treessassin's Guise and then (without targeting anyone else) use your Ai-Lis Himmelsspiegel. Since this force-targets yourself, you'll be turned into a walking tree for 10 minutes!
This item is like an improved version of Schattenmimik but with a cast time. It's even better because you become untargetable, makes for some fun world pvp when you have too many people on you. Turn into a tree and watch everybody circle around you trying to figure out how to get you, then Avianas Feder feather out of there!
The downside is it's cast time, which can be interrupted or you could be killed before the cast finishes, and it's not very good for ambushing people because it only lasts 1 minute, but Tarner 54 is awesome for ambushing! All in all if you like having fun with world pvp it is definitely worth taking the time to get this item.
This item is like an improved version of Schattenmimik but with a cast time. It's even better because you become untargetable, makes for some fun world pvp when you have too many people on you. Turn into a tree and watch everybody circle around you trying to figure out how to get you, then Avianas Feder out of there!
- Zeitverlorenes Artefakt - this has no cooldown on equip.
- Gesegnetes Medaillon von Karabor - if not equipped you can equip and wait on the cooldown.
- Flammenschnuppe - for excellent comedic effect.
Something interesting is if you are under the effects of Eid des Feuerwächters when using this, the Ordon Fire-Watcher transform remains unchanged when Treessassin's Guise is active (you do not turn into a tree visually, but the rest of the effect is the same)... you suddenly become invulnerable and untargetable to enemies, which is very confusing to whoever is attacking you. Generally they just walk away after a couple seconds thinking you disconnected from the game and they are just experiencing a weird side effect of server latency.
"Wird von Baumassassinen zum ermorden hochrangiger Bäume verwendet. Ernsthaft."