The [Spectral Gryphon] mount is the Alliance-side reward for when an inactive player accepted your Scroll of Resurrection and subscribed to World of Warcraft for at least 30 days. This reward became first available on March 6, 2012.

Yeah, it's a gryphon (alternatively: griffon) but the addon does the trick so I really don't care what it's called. It's better than running a script every time you log a toon.

Kinda like shown in the image, if that helps. There was an addon that used to hide the gryphons but it seems like the script it used no longer …