One of the most compelling features of massively-multiplayer games is the near infinity of things to do in them - content to suit many different playing styles. 'Raids' are assaults by larger groups of players on powerful monsters or dungeons and in World of Warcraft can include everything from a group of lower level characters tackling a quest well above their level to the epic end-game, high-level attacks against god-like foes.
Click on a screenshot or raid area name to go to a more detailed page on that raid area.

Medivh, the Last Guardian, made his home in Deadwind, in the bright tower of Karazhan. Though he was the greatest wizard of his day (and humanity's intended custodian) Medivh was secretly possessed by the dark spirit of Sargeras, the Destroyer of Worlds. Through Medivh, Sargeras opened the Dark Portal and allowed the orcs to wage war upon the mortal kingdoms of Azeroth.
10 Player limit

The stronghold of Zul'Aman has stood for millennia as the Amani trolls' seat of power and bastion of the fearless, cunning warlord Zul'jin. He has spent several years plotting behind Zul'Aman's walls. Furious at the Horde for allowing his hated enemies, the blood elves, to join its ranks, he eagerly embraced a scheme that the witch doctor Malacrass recently proposed: to seal the power of the animal gods within the bodies of the Amani's strongest warriors. Now Zul'Aman's army grows more powerful by the day, hungry to exact vengeance in the name of its fearless leader.
10 Player limit

After the Legion came to Outland, Magtheridon controlled all but small pockets of Outland. Even so, he was taken largely by surprise when Illidan and his allies conquered the Black Temple. Many believed that Magtheridon had been slain in the attack. However, it was discovered that Magtheridon's blood could be used to corrupt the orcs. Beaten and bloodied, the pit lord was dragged to Hellfire Citadel. Bound by chains both physical and magical, Magtheridon survives, wounded to the brink of death and drained of his blood each day by Illidan's minions. From his tainted blood a new army of barbaric fel orcs has risen.
25 Player limit

Whoever controls the water controls Outland.

This is the law passed down by Lord Illidan Stormrage to his most trusted lieutenant, Lady Vashj. Shortly after the Third War, when Illidan requested the aid of the naga, a group of naga led by Lady Vashj answered his call. Ever since, Vashj has displayed a fierce dedication to Illidan. Now the naga witch carefully monitors Coilfang's operations from her seat of power within Serpentshrine Cavern. Far more at home here among the waters of the reservoir than locked within the cold stone walls of Black Temple, Vashj maintains a close eye on her minions and personally oversees the draining of Zangarmarsh.

Whether her loyalties belong to Illidan alone, however, remains to be seen.
25 Player limit

 

Today Gruul the Dragonkiller is worshipped as a deity by the ogres of the Blade's Edge Mountains. His powerful sons ravage both the Blade's Edge Mountains and the plains of Nagrand. Gruul's unparalleled strength and experience in battle would pose a serious threat if he ever chose to attack Horde or Alliance forces in Outland.
25 Player limit