Zandalari hunters automatically know how to tame Direhorns. Hunters of other races must learn the skill from an Ancient Tome of Dinomancy which is a rare drop from Zandalari Dinomancers on the Isle of Giants in Pandaria. This skill is NOT account-wide.
Location & Notes:
Located in The Far Reach, Nazmir. Has spears embedded in its hide which are lost upon taming.