First seen in build 12.0.7.68887 (Midnight (patch 12.0.7)).
Related
Crimson Colossus Armguards Game Data
Appearance
In the Appearances collection, Crimson Colossus Armguards is listed as Boss Drop. Appearance IDs: 38420, 38398, 38431, 38409. 4 other items wear the same appearance:
Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Crimson Colossus Armguards Compares
Who It Suits
Plate is the armor type Death Knight, Paladin and Warrior wear. With Strength or Intellect, Crimson Colossus Armguards suits Arms, Fury and Protection Warrior; Holy, Protection and Retribution Paladin; Blood, Frost and Unholy Death Knight.
Transmog Sets
Crimson Colossus Armguards is part of the transmog set Eternal Curator's Protectorate (Warrior, Paladin and Death Knight only), which the Appearances collection lists in 4 versions. The other 16 pieces:
Blizzard numbers items as they are created, so the named items next to ID 160637 (160632 to 160642) were usually added in the same batch as Crimson Colossus Armguards: the same quest line, zone, vendor or reward set.