Forsaken hunters automatically know how to tame undead creatures. Hunters of other races must learn the skill from a Simple Tome of Bone-Binding which is a rare drop from miscellaneous Elite NPCs throughout Maldraxxus and its associated dungeons: Plaguefall and the Theater of Pain.
3 possible appearances:
Location & Notes:
Located in Sacrificial Pits, Atal'Dazar (Dungeon). Spawns if you run over one of the purple piles of bones during the Rezan encounter. Unfortunately, it won't spawn unless you're in combat with Rezan.