About a year after Wrath is released I finally got this achievement on my Shaman today. Took 4 trips to Violet Hold to finally get the water boss to complete the second last one, then a quick trip to Oculus to ride the Emeral Drake to complete it and I got my Red Proto Drake
This is my second Proto-Drake, since I don’t raid much, I was pretty excited. I have the Blue Proto from Upper Pinnacle, this also gives me my 76th mount, 24 to go for the Mountain of Mounts. Here’s a couple screenshots.