Mount collectors get some love in Midnight (aside from the huge number of new mounts to collect, of course)! There’s a new many mounts collected reward and it’s a… well, mount, obviously.
Recolor/Slight Rework
The new mount coming in Midnight will be awarded if you collected 600 mounts. 
Anu’shalla, Shadow’s Guidance and the new Insurmountable Collection achievement are a nice new reward for those that really like their mounts. Of course, there are players out there with many, MANY more than “just” 600 mounts, but we’ll get there eventually!
The mount itself is a rework and recolor of Reins of Anu’relos, Flame’s Guidance, dropped by Fyrakk in Dragonflight’s Amirdrassil. Here’s what it looks like:
And here’s a side-by-side comparison with the Fyrakk mount:
Will you be going for those 600 mounts in Midnight? Or are you already there?