As a matter of fact, the world event in 2.4 involves the Shattered Sun Offensive - a new faction - working to reclaim the Isle of Quel'Danas, one chunk at a time. Each phase has a goal (or several goals) and the new dailies for that phase work towards those goals; the goals are achieved when the dailies have been done often enough server-wide.
   First and foremost, you start at Neutral with the Shattered Sun Offensive. There are six or seven daily quests open to you. To kick it all off, though, you'll want to get the starter quest from the questgiver near A'dal in Shattrath, and head to the Isle of Quel'Danas. You'll automatically know the flightpath once you hit a flight master in the Eastern Kingdoms; Quel'Danas is connected by flightpath to Zul’Aman and apparently also to Silvermoon, for the Horde.
As follows, here are the SSO dailies. Note that unlike other sets of daily quests, new quests open up depending on how far your server is through the world event, not based on your own personal reputation level. The only quests that are affected by your own rep are: a single quest at each new rep level which doesn't actually require you to do anything, other than pick up a package of freebie rewards, and a single quest at Exalted which is the avenue to getting the new title. Everything else is available at Neutral rep, if your server has unlocked the phases.
In a small camp near the landing on Isle of Quel'Danas, there are two dailies here, working on reclaiming the Sun's Reach Sanctum. These two quests are "The Sanctum Wards" and "Erratic Behavior" are described below. When these two quests reach their goal, the Sanctum is reclaimed.
And also it offers five more daily quests with no specific goal, three of which start in Shattrath: "Sunfury Attack Plans", "The Multiphase Survey" and "Gaining the Advantage"; and two at the Throne of Kil'Jaeden: "Blood for Blood" and "Blast the Gateway".
The Sanctum Wards is given by Theris Dawnhearth at the staging area on Quel'Danas. To complete it, kill Wretched Fiends and Wretched Devourers and gather 4 Mana Remnants from their corpses, then use (right-click) the Mana Remnants on a sanctum ward (the big red floating crystals with Wretched mobs around them). The mobs can be found all around the starting area on the island; don't go down into Dawnstar Village, as it's a different kind of enemy down there.
Erratic Behavior is given by Vindicator Xayann at the staging area on Quel'Danas. She gives you a stack of modified golem control cores. Find and kill 5 Erratic Sentries; use the modified cores on each sentry's corpse to reanimate it as a Converted Sentry. It'll accept its new orders and run around happily. Two things to note: first, loot the sentries before you convert them, else you lose the loot; second, it's worth doing this at the same time as the Sanctum Wards as the mobs are in the same area, and these mobs are non-agro so once you're done with the quest you can ignore them.
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