WoW Transmog — Browse All Transmog Sets
Browse all 3,100+ World of Warcraft transmog appearance sets. Filter by expansion, armor type (Cloth, Leather, Mail, Plate, Cosmetic), and PvP sets. Track your wardrobe completion across all expansions.
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.
Armor of the Amaranthine Path
Plate set. Wrath of the Lich King. Part of the Holy Paladin dungeon-"set" (there's no bonus, or naming scheme, but all the pieces form a unified look for you toon) added in Patch 4.3...
The Armor of the Amaranthine Path is a Holy Paladin transmog set added in Patch 4.3, with all pieces dropping from the Echo of Baine, Echo of Jaina, Echo of Tyrande, and Echo of Sylvanas in the End Time dungeon.
Switch to Holy Spec
Before running End Time, set your specialization to Holy Paladin. The pieces are Intellect-based plate tuned for Holy, and drops appear to be tied to running the dungeon in the correct spec and class — farming on Protection, Warrior, or Death Knight has resulted in no drops even across many runs.
Enter End Time Dungeon
Enter End Time and defeat Echo of Baine, Echo of Jaina, Echo of Tyrande, and Echo of Sylvanas — all four bosses can drop pieces from this set, so clear the full dungeon each run.
Collect All Six Pieces
Farm until you have all six pieces: 
Boots of the Treacherous Path, 
Breastplate of Despair, 
Helm of Power, 
Pauldrons of Conviction, 
Time Altered Legguards, and 
Waistguard of Lost Time. Note that no gloves are currently associated with this set.
Tips
Run this dungeon exclusively on a Holy Paladin — repeated runs on other plate-wearing classes or specs have produced no drops, while switching to Holy yielded drops within two runs.