Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Seawitch Gloves Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Seawitch Gloves suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Transmog Sets
Seawitch Gloves is part of the transmog set Vestments of the Manasinged (Priest, Mage and Warlock only). The other 16 pieces:
Blizzard numbers items as they are created, so the named items next to ID 134261 (134256 to 134266) were usually added in the same batch as Seawitch Gloves: the same quest line, zone, vendor or reward set.