Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Offal Galoshes Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Offal Galoshes suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Transmog Sets
Offal Galoshes 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 134416 (134411 to 134421) were usually added in the same batch as Offal Galoshes: the same quest line, zone, vendor or reward set.