Sargeras is the Lord of the Burning Legion is Warcraft. He is the devourer of worlds. At his right hand sits Archimonde. Him > you
Sargeras the Firelord from Warcraft
The Tomb of Sargeras is where the Avatar of Sargeras rests. It is not player accessible, and is only known through lore.
Sargeras or Elune i think one of these two
In the raid near the Maelstrom. You can only get there in the next expantion AFTER the Lich King.
We don't know - but I wouldn't bet on it - it's likely some other less powerful being - killing Sargeras ends the series and ... the money. Maybe Kel Thuzud - he seems to have nine lives.
Quoting from Blizzard itself:"In his fury, Sargeras shattered the prisons of the eredar and the Nathrezim and set the loathsome demons free. These cunning creatures bowed before the dark Titan's vast rage and offered to serve him in whatever malicious ways they could. From the ranks of the powerful Eredar, Sargeras picked two champions to command his demonic army of destruction. Kil'jaeden the Deceiver was chosen to seek out the darkest races in the universe and recruit them into Sargeras' ranks. The second champion, Archimonde the Defiler, was chosen to lead Sargeras' vast armies into battle against any who might resist the Titan's will. ""Kil'jaeden is a powerful eredar demon lord and is the acting leader of the Burning Legion. Selected twenty-five thousand years ago as the chief lieutenant of Sargeras, he was ranked above the now-deceased demon lord, Archimonde."(http://www.wowwiki.com/Kil%27jaeden)So, Kil'jaden was an Eredar, and "the eredar were a species of supremely talented magic-wielders who arose on the planet Argus countless millennia ago. They built a vast civilization of wondrous cities and a peaceful way of life on the planet" (http://www.wowwiki.com/Eredar)Hope that helps!
Kil'jaeden the Deceiver is a powerful eredar demon lord and is the acting leader of the Burning Legion. Selected twenty-five thousand years ago as the chief lieutenant of Sargeras, he was ranked above the now-deceased demon lord, Archimonde.W3Man 93 S&L 60, 154 While Archimonde had led the Legion's armies, Kil'jaeden's agenda was to assimilate every race possible into the folds of the Burning Legion. Since the apparent banishment of Sargeras, he has assumed the role of supreme commander.
Currently, The Lich King, Arthas. He is the big man to beat. In Cataclysm, due to be released sometime in 2010, it will be Deathwing. Overall It would have to be Sargeras, Corrupted titan. He was, by some definition, killed at some point so yeah.
The war of the ancients was considered to be the first major war on Azeroth involving the sentient races. It was a war against the burning legion when Queen Azshara and her high elves opened a portal to let Sargeras come through. Malfurion Stormrage helped to close the portal before Sargeras came through, even though he lost his daughter in the process. The blue dragonflight was also decimated during that war, due to the actions of Deathwing and his demon soul. It was then that the Sundering occurred, breaking apart Azeroth and leaving a swirling magic vortex in the center where the well of eternity used to be. This led to the creation of Nordrasill and the night elves immortality and eventually to the creation of Teldrasill.
From WOWiki.com:The Dark Portal was created by a joint effort between Medivh, possessed by the Dark Titan Sargeras, and the warlocks of the Shadow Council, which allowed the Horde to invade the world of Azeroth. The Portal bridged the distance between the worlds of Azeroth and Draenor, and it was large enough that individuals might pass through it. Gul'dan immediately dispatched orc scouts through the Portal in preparation for the coming invasion. After the Portal was widened, the armies of the orcs poured through it into the unsuspecting Kingdom of Azeroth, beginning the First War.
The Burning Legion is the combined might of demonic forces traveling the Twisted Nether, invading worlds and conquering them. Their aim is to have the inhabitants of these worlds join their legion as demons, and conquer more worlds until all falls under their reign. The tacticians of the Legion are the Nathrezim, the vampiric Dreadlords, with their inifinite schemes and charisma. Leading the forces are the Eredar, most notably Kil'jaeden and (before his destruction) Archimonde. At the very head of the Legion stands the fallen Titan Sargeras, whose hatred and lust for conquest drives the Legion ever forward.
Blackhand the Destroyer was warchief of the Horde during the first war between the Orcs and Humans. He is the one responsible for the Demonic taint on the Horde, and the inclusion of Orc Warlocks. Under the advice of the Warlock Gul'dan, Blackhand led his Orc armies through the Dark Portal, and waged war on Humans. He managed to destroy their capital, Stormwind, but was later weakened as Gul'dan was left comatose attempting to mentally probe Medivh for information on the Tomb of Sargeras. Blackhand was then decapitated by his second-in-command, Orgrim Doomhammer, who became the new Warchief of the Horde.
Farming for Fel Armaments and Marks of Sargeras from warlocks at Legion Hold. My previous go-to gold-making strategy (fishing in Nagrand) was getting me 200-300g an hour typically; Legion Hold would be more like 400g if I sold everything, and I need the Aldor rep anyway (so I'm selling the Armaments and turning in the Marks). The best part about Legion Hold is that the mobs there are perma-spawned: there are always at least certain number alive at a time, so no matter how many people are farming there, you never have to wait for spawns.