Final Fantasy XIV is abundantly ... find the Megalotragus Horn under the first category of scrip rewards. This will in turn summon the grey-and-white, big-horned sheep mount named Megalotragus ...

Here's how to get the second mount ... FF14: Dawntrail, but that shouldn't discourage you from getting it. You'll need to get 100,000 Orange Gatherer's Scrips and turn them into Rroneek Horn ...