The Battle Nug is a type of nuggalope in Dragon Age: Inquisition that can be used as a mount.
Acquisition
In Val Royeaux there is a merchant on the top floor (accesible by fast travel) that sells a "Mysterious Box" for 10000 
. After purchase, a golden nug will appear in the shop. If you interact with it, you will be given a new War table operation called A Big One? After completing the operation, all five nuggalope mounts will be available at the stables in Skyhold.
Location
Once acquired, it can be found in the stables in Skyhold.
Gallery
Battle Nug mount
Battle Nug mount