In Wrath of the Lich King it is item level 226, requires level 80 and is named Frostfire Robe. In MoP Classic it is item level 213, requires level 80 and sells to vendors for 1c.
Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Valorous Frostfire Robe Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Valorous Frostfire Robe suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Transmog Sets
Valorous Frostfire Robe is part of the transmog set Valorous Frostfire Garb (Mage only). The other 9 pieces:
Blizzard numbers items as they are created, so the named items next to ID 40418 (40412 to 40423) were usually added in the same batch as Valorous Frostfire Robe: the same quest line, zone, vendor or reward set.