Per Jagex, the Lost City in the Elves contains: von smrtsmiths Blog

    Largest quest (Plague's End) and largest city in RuneScape (the elf area of Prifddinas)
    Dozens of the latest skill training techniques, new weapons, and armors
    New mini-games, including a combat horde mode
    A max guild social hub for 'Completionist' players
    Hundreds of hours of the latest gameplay
RuneScape senior narrative designer OSRS Gold David Osborne said the production of Lost City on the Elves today can be a "landmark" from the history on the browser-based free-to-play game. Over the experience's 13-year run, Osborne stated it has "captured the imagination of millions of players."
*The Elf Quest story began in August 2002 with The Plague City. Subsequent installments were Biohazard RuneScape Gold (October 2002); Underground Pass (March 2003); Regicide (September 2004); Roving Elves (February 2005); Mourning's End Part I (July 2005); Mourning's End Part II (October 2005), and Within the Light (October 2009).