Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Time-Breached Waistband Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Time-Breached Waistband suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Transmog Sets
Time-Breached Waistband is part of the transmog set Vesture of Borrowed Souls (Priest, Mage and Warlock only). The other 16 pieces:
Blizzard numbers items as they are created, so the named items next to ID 137413 (137408 to 137418) were usually added in the same batch as Time-Breached Waistband: the same quest line, zone, vendor or reward set.