Reese
Source: Achievement. Even Nirobin, a self-proclaimed genius of the highest caliber, could not deny the cuteness of his arcane creation. Magic type. So, I just got and the first thing I did was use on him to make 2 Reese ("Reeses"?)!
Reese is an arcane-themed flying squirrel pet obtained through an Achievement in Dragonflight.
Guide awaiting review
Use Magic Pet Mirror
Use 
Magic Pet Mirror while Reese is active to transform into a ghostly flying squirrel yourself. If you are a Demon Hunter and jump to glide, you will sprout a pair of ghostly Demon Hunter wings rather than a squirrel glide animation — and if your DH wings are glyphed with 
Glyph of Tattered Wings, the transformation will display ghostly tattered wings instead.
Tips
Using Magic Pet Mirror with Reese active creates two Reeses at once, since your transformed character counts alongside the summoned pet.
