Below the city there's a procedurally-generated skilling dungeon and a huge Slayer dungeon, the former offering a fresh and limitless area for non-combat art boosting, while the latter serves as a high level Slayer dungeon with monsters beginning at combat level RuneScape gold.
Jagex estimate that it'll take you at least 40 hours to get through Menaphos. Obviously, that depends on what degree you're as you go into the growth and how completely you want to research beyond the four main quests and 21 level increase to the Slayer skill.
That is an unparalleled amount of content for one Runescape update, also Jagex's intention to release another expansion of this size in September and December reveals this isn't a one-off gesture; it is a brand new way of playing Runescape.
"It's a huge change for us and our current player base cheap RS gold in terms of the way we deliver content," says lead designer David Osborne. "We're utilized to drip-feeding great, additive pieces of content each week, but that is about bringing all of that together to give players something they can really immerse themselves - a long-form story, a great deal of skilling and battle content, an expansion to a degree cap - all the things you would want or expect from an expansion"