Can only be used by hunters in the Beast Mastery spec. Minimum level 39 in Shadowlands.
You must learn the skill to tame Gargons, which is taught by a Gargon Training Manual, a guaranteed drop from Huntmaster Petrus, a rare NPC that can appear in the Witherfall Ruin area of south-east Revendreth. It appears this manual can only be read at level 60.
Location & Notes:
Located in Halls of Atonement (non-instanced), Revendreth. Situated in a tower above the Halls of Atonement dungeon entrance.