"From today, high level players can begin their journey towards Prifddinas by taking part in the new and epic Plague's End quest, the largest adventure in RuneScape to date. As well as being voted by RuneScape players as part of the game's Player Power initiative, the development of the Lost City of the Elves has seen considerable collaborative efforts between Jagex and the community throughout its creation. The expansion pack is being released in three parts to enable players to experience and enjoy all areas of the new content. Today's release of Plague's End will be followed by the unlocking of one half of the elf city in September, and the second half in October."The expansion also includes new skill training methods, wearables, minigames, a "guild social hub," and the largest city in the game to date.
[Source: Jagex press release]