It was added on 21 August 2013.
Divination is here! The first new skill in Runescape for 3 years has been introduced allowing players to gather the energy and memories of the fallen god Guthix. With this major addition to the world of Gielinor it is likely that there are many questions pertaining to the functionality of this skill and the lore that surrounds it. Want to get quizzical? Head over to our Q&A session hosted on Reddit at 7pm BST this Wednesday.
On hand to demystify the Divination skill are Mods Hew and Ana, part of the design and development super team behind this update. They will be collectively holding our latest Reddit Ask Me Almost Anything Q&A session focused on the new Divination skill. Throughout this session they'll aim to give you deeper insights into their work, influences and experiences in developing the new skill and any pro-skilling tips they have on hand.

When: Wednesday – 21st August – 7pm to 9pm BST (1pm – 3pm EST/11am – 1pm PDT).
Where: http://www.reddit.com/r/IAmA/. The thread will be posted a short time before we start.
We're looking forward to reading your questions! Meanwhile, if there is someone who you'd like to see taking on the challenge and doing a Reddit Q&A session, feel free to suggest them on the discussion thread.
Mod Crow & The RuneScape Community Team
Discuss this here.