Behemoth

Summon your mighty behemoth, trained from birth to carry you...not trample you underfoot like an ant.

Immediately following the Calamity, an adventurer returning to Gridania from Falcon's Nest in Coerthas claims to have happened upon a den of baby behemoths who had lost their mother. Despite objections from friends and family alike, she kept the beasts, eventually training them to serve as mounts.