The game's collection data lists Massacre Treads as sold by 3 vendor NPCs in Orgrimmar, Stormwind City and Dalaran. The first vendor stands at 37.9, 70.8 on the Orgrimmar map.
Vendor NPC, zone and position come from the client's collection source tables (CollectableSourceInfo and CollectableSourceVendorSparse); coordinates are the in-game map readout.
Build history
First seen in build 5.5.4.69585 (Mists of Pandaria).
Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Massacre Treads Compares
Who It Suits
Plate is the armor type Death Knight, Paladin and Warrior wear. With Strength or Intellect, Massacre Treads suits Arms, Fury and Protection Warrior; Holy, Protection and Retribution Paladin; Blood, Frost and Unholy Death Knight.
Transmog Sets
Massacre Treads is part of the transmog set Earthen Battleplate (Warrior only). The other 16 pieces:
1 other item in the current build is also called Massacre Treads. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Blizzard numbers items as they are created, so the named items next to ID 59221 (59216 to 59226) were usually added in the same batch as Massacre Treads: the same quest line, zone, vendor or reward set.