Schematic Reassimilation: Adorned Vombata

You can get [item=187632] schematics from [object=375484] treasure in Zereth Mortis zone

1. 
   
2. This treasure is intended for those who already unlocked flying in Zereth Mortis .
   But you can get it without flying. Use Door of Shadows or similar ability, starting from the Gradle of Nascence closest vault entrance
   Door of Shadows locations:
   /way 40.57 75.49 1 Go on top of the triangle entrance ark
   /way 39.56 76.53 2 Step
   /way 39.57 76.66 3 Step
   /way 39.61 77.69 4 Step
   /way 40.09 78.08 5 Step
   /way 37.15 78.28 6 Grateful Boon treasure location
   
   
   
3. 
   
4. You need to pet all the animals on top of the mountain
   5x[npc=185296] 4x[npc=185297] 3x[npc=185298]
   They are running around and will stop when you succeed with the pet cast
   2 hard to find (use Door of Shadows to get there):
   /way 37.41 78.23 on top of the sphere
   /way 36.66 76.27 on the wall
   
5. 
   
6. After you pet the last one the [npc=185293] in the middle of the area will unlock the treasure
   Reward is [item=189478] that you can learn after completing the Schematic Reassimilation: Adorned Vombata
   It unlocks the [item=187632] mount craft at [npc=184172]. Reagents required => Adorned Vombata
7. 
   

Grateful Boon treasure is a part of Treasures of Zereth Mortis achievement.

[object=375484] & [item=187632] schematics video: https://youtu.be/FnEaoafgD3g

For the people like me coming here to get the schematic after opening the Grateful Boon. Just calm all 12 creatures again and it will spawn again. At least it did for me.

I just went to go pet all the calmed pets since I already looted the Grateful Boon before I had the pet forge and the schematic was lying on the ground. So if you already looted the Grateful Boon, go back and pick up the schematic. It's in front of Tah Fen.