Champions of the Horde and the Alliance, prepare for a new challenge! Starting today, a host of new content is available in World of Warcraft: Battle for Azeroth, including the expansions first raid, Uldir; the first Mythic Keystone dungeon season and Rated PvP season; and the start of the Warfront cycle.
Source: N4G PC World of Warcraft: Battle for Azeroth New modes available today