The war ended when Sauron himself came forth and fought Gil-galad in combat, who was then joined by Elendil. Although they both fell, they managed to defeat Sauron and bring him down.
Although Sauron knew that Men were easier to sway, he sought to bring the Elves into his service, as they were far more powerful. By about SA 1500, Sauron put on a fair visage and called himself Annatar, the "Lord of Gifts".
Sauron fought with Gil-galad and Elendil, and both were slain. As Elendil fell, his sword was broken beneath him. Yet Sauron was thrown down, too, and Isildur seized the hilt of his father's sword and cut off the finger on which Sauron wore the One Ring.
In Tolkien's stories, Celebrimbor was an elven-smith who was manipulated into forging the Rings of Power by the Dark Lord Sauron, in fair disguise and named Annatar ("Lord of Gifts").
Isildur used a broken sword to cut the Ruling Ring off Sauron's hand. Sauron was fatally wounded by Gil-galad and Elendil as Sauron killed them. Gandalf took the job of blocking the Balrog - and he was barely able to defeat the Balrog (in fact, he died in the process). A few reasons.
In the books, Isildur did not defeat Sauron; it was his father Elendil and the Elf King Gil-galad who defeated Sauron together at the cost of their lives. Isildur cut the Ring from Sauron's dying body, and his spirit fled.
The Elven King named Gil-galad fought side-by-side with Elendil, the King of Men. Together they managed to mortally wound Sauron, but the fight cost them their lives. This is when Isildur, son of Elendil, took his father's sword and cut the Ring from Sauron's hand, dealing the final blow.
When Halbrand and Galadriel captured Adar, Adar seemed not to recognize Halbrand as Sauron. Adar also claimed to have killed Sauron after watching Sauron experiment on the orcs, whom Adar sees as his children. It's possible Adar was pretending not to recognize Sauron as part of a ruse.
"So I think in his pitch to Galadriel, it cannot mean that he loves her or that there's any kind of romantic relationship. There should be no ambiguity around the fact that Sauron is evil — he's terrible, and he's using Galadriel to enhance his power."
Halbrand does not deny his heroism out of bashful humility, though; he knows that as Sauron, he's not the hero she wants him to be for the Southlands -- not when his plans involve scorching it into Mordor. No, Halbrand was never a hero, nor did he ever claim to be.
Defeated by the Host of Valinor in the War of Wrath, Morgoth was banished from Middle-earth into the Timeless Void, though it was prophesied that he would one day return.
Finally Sauron came out to fight Elendil and Gil-galad face to face. When Elendil fell, his sword Narsil broke beneath him. Isildur took up the hilt-shard of Narsil and cut the One Ring from Sauron's hand, vanquishing Sauron.
Sauron's deepest fear was that Aragorn would use the Ring against him. With its powers of domination, Aragorn could comfortably take over the entirety of Sauron's dark army. Though this would eventually corrupt Aragorn, it would allow him to destroy Sauron and take his place.
Morgoth is the more powerful of the two. Morgoth was the mightiest of the Valar, a group whose weakest member would outpace Sauron. However, there are some circumstances and eras in which Sauron would win the day. Morgoth was born far beyond Sauron but lost and surrendered much of his power.
This was how Halbrand/Sauron actor Charlie Vickers played the part, saying he believed the proposition to become his queen came "from a place of selfishness." Regardless, Galadriel denied the proposal. However, her answer did not come without hesitancy -- which was exactly why Celeborn needed to be out of the picture.
Sauron wants Galadriel to become his queen because she's useful, says Vickers. As he's already shown, Sauron can accomplish his objectives much more quickly when he has a highly regarded Elf warrior to get him into places like Numenor and Eregion (where Celebrimbor lives). “He feels a connection to her.
Additionally, while he was in his weakened state, Galadriel could hold him off through the power of will alone. However, if Sauron had his One Ring and faced off in a battle against Galadriel, it's unlikely that there would be much she could do.
After Morgoth's defeat, Adar at first served Sauron in the latter's mission to discover a way to subdue other forms of life. However, disillusioned by Sauron's cruelty to the Orcs, Adar turned on Morgoth's successor and struck him down, believing for centuries afterward that he had slain Sauron.
The story was abandoned, but Tolkien reused the characters and events. Isildur features briefly in voiced-over flashback sequences of Peter Jackson's The Lord of the Rings film trilogy. The video game Middle-earth: Shadow of War departs from Tolkien's narrative by having Sauron make Isildur into a Nazgûl or ringwraith.
One thing episode 6 of The Rings of Power completely puts to rest is the theory that Adar could be Sauron. Adar certainly knew Sauron, but he wasn't a fan. He tells Galadriel that in his quest to master Middle-earth, Sauron sacrificed many of Adar's children. Because of this, Adar killed Sauron.
Melkor is the most powerful of the Valar but he turns to darkness and is renamed Morgoth, the primary antagonist of Arda. All evil in the world of Middle-earth ultimately stems from him. One of the Maiar of Aulë betrays his kind and becomes Morgoth's principal lieutenant and successor, Sauron.
Elendil's son, Isildur, cut the Ring from Sauron's hand on the slopes of Mount Doom. Though counselled to destroy the Ring, he was swayed by its power and kept it "as weregild for my father, and my brother".
The first line of the Kings of Gondor were primarily members of the House of Anárion. Elendil was the first King of Arnor and was succeeded by Isildur. Elendil ruled over both realms as High King of the Dúnedain-in-exile Isildur succeeded as High King as well upon his father's death.
