In Wrath of the Lich King it is item level 245, requires level 80 and is named Worldbreaker Faceguard. In MoP Classic it is item level 232 and requires level 80.
Read from the World of Warcraft client build files.
How Conqueror's Worldbreaker Faceguard Compares
Who It Suits
Mail is the armor type Evoker, Hunter and Shaman wear. With Agility or Intellect, Conqueror's Worldbreaker Faceguard suits Beast Mastery, Marksmanship and Survival Hunter; Elemental, Enhancement and Restoration Shaman; Devastation, Preservation and Augmentation Evoker.
Transmog Sets
Conqueror's Worldbreaker Faceguard is part of the transmog set Conqueror's Worldbreaker Regalia (Shaman only). The other 16 pieces:
Items Numbered Next to Conqueror's Worldbreaker Faceguard
Blizzard numbers items as they are created, so the named items next to ID 46212 (46207 to 46217) were usually added in the same batch as Conqueror's Worldbreaker Faceguard: the same quest line, zone, vendor or reward set.