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Browse transmog sets from raids, dungeons, PvP, and quests across all expansions. Filter by armor type (plate, mail, leather, cloth) and source. Track which appearances you own and which you still need via Battle.net sync.
Rylakstalker's Battlegear
Plate set. Mists of Pandaria. Combination belt and pencil sharpener.
Rylakstalker's Battlegear is a mail transmog set for hunters obtained through garrison follower missions that reward Cache of Highmaul Treasures from the Highmaul raid in Warlords of Draenor.
Recruit two ilvl645 followers
You need two followers at item level 645 in your garrison before the cache missions will become available to you.
Complete Highmaul boss kills
Accumulate raid boss kills in Highmaul to unlock the corresponding cache tier: the Normal 
Cache of Highmaul Treasures requires no prior kills, the Heroic cache requires 15 Normal mode boss kills, and the Mythic cache requires 15 Heroic mode boss kills.
Run the garrison mission
Once your follower and kill requirements are met, the mission will appear in your garrison mission table — hover over the cache reward in the mission tab to confirm whether you are receiving a Normal, Heroic, or Mythic cache before sending your followers.
Open cache for set pieces
Defeat bosses in Highmaul directly as a max-level player to supplement your cache farming, since you can receive duplicate items from multiple caches.
Tips
The Mythic bonus cache reportedly requires 15 Mythic boss kills, though some sources suggest the threshold may be as low as 7 kills.
You can receive the same Rylakstalker's Battlegear piece twice from these caches, so duplicates are possible and do not indicate a bug.