In The Burning Crusade it is item level 136 and requires level 70. In Wrath of the Lich King it is item level 136, requires level 70 and sells to vendors for 1c. In MoP Classic it is item level 136, requires level 70 and sells to vendors for 1c.
Read from the World of Warcraft client build files.
How Merciless Gladiator's Dreadweave Hood Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Merciless Gladiator's Dreadweave Hood suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Items Numbered Next to Merciless Gladiator's Dreadweave Hood
Blizzard numbers items as they are created, so the named items next to ID 31974 (31968 to 31979) were usually added in the same batch as Merciless Gladiator's Dreadweave Hood: the same quest line, zone, vendor or reward set.