Four wings, 14 new bosses, including the finale against Garrosh Hellscream.
Among the multitude of changes, additions and new locations coming to the Mists of Pandaria patch 5.4 in World of Warcraft is the new 10-man and 25-man (and flex) raid instance called the Siege of Orgrimmar. Blizzard has offered up a look at the 14 new boss encounters in the raid, along with a bit of background from lead encounter designer Ion "Watcher" Hazzikostas. Of course, if you want to be totally surprised, read no further, as you may consider this a bit of a spoiler.
The raid will have two different locations, the first in what's left of the Vale of Eternal Blossoms, and the other in the city of Orgrimmar. Based on the descriptions and the way the boss fights are listed, it appears as if only the first wing -- complete with four boss encounters -- will be in Pandaria.
Enter the world of Azeroth and battle against the Alliance of humans, dwarves and night elves or the brutish orcs, trolls and undead of the Horde. World of Warcraft has a very large community of players with hundreds of servers and a myriad of endgame pursuits from raiding dungeons, questing, achievement hunting, PVP arenas, and now pet battles.
Once players move to the city of Orgrimmar, there will be some interesting encounters, including the very first one which has the players approaching by sea for a Normandy-style D-Day invasion where the raid party must split up to take down various emplacements.
As players go deeper into the instance, they will face more of Garrosh's fanatical Horde, including a massive devilsaur, a goblin siegecrafter and mechanical constructs. There is even a room where players must shut off a defense system to get to the loot.
"When we were coming up with concepts for the different rooms and wings of Garrosh's base, we envisioned a warehouse in which he kept the various artifacts, weapons, and other treasures he had plundered during the Horde campaign in Pandaria," Hazzikostas said. "An archaeological conservationist Garrosh is not. It's been a long time since we've made a Raid encounter that didn't have a single conventional 'boss,' but the objective here is simply to shut down the security system before it blows you all up."
Some "boss" encounters will include multiple enemies, such as the encounter right before Garrosh. Players will face off against the nine surviving Klaxxi'va Paragons. Hazzikostas said this meeting, like a couple others in the raid instance, are foreshadowed a bit if players are paying attention.
The final encounter against Garrosh will have the Horde chief cornered. "Even though you fight him in his throne room beneath the city of Orgrimmar, far away from the verdant shores of Pandaria, Garrosh is still the ultimate villain of the Pandaria expansion, and we felt that it was important to forge a strong connection to the Pandaria story arc within the encounter itself," Hazzikostas said. "As Garrosh wields the power of Y'Shaarj -- origin of all the sha -- players must battle through some of the most memorable locations where the sha manifested in Pandaria. At the end, when his back is up against a wall and he is cornered in his own lair, Garrosh ends up facing the same sort of choice that once doomed his father."
There you have it. Be prepared to start the siege with the launch of the patch on September 10. The various wings will have a staggered opening as past raid instance opening have had.
Source: World of Warcraft blog