Introduction to the background and source of the undead in the frozen throne of warcraft 3

The background of the undead is very complicated and involves many things. I tidied up. OK at last.

orcs controlled by the Burning Legion

Under the command of Sargeras, the leader of the Burning Legion who tried to control the world, Kilgardan, the second-in-command of the Legion, made a plan to invade Azeroth for the second time (the plan for the first invasion was in the history of night elves in ancient times). Kilgardan believed that before the Burning Legion landed, there must be a new force to weaken Azeroth's defense. It was then that Kilgardan discovered Junnuo, another rich world in the universe. Junnuo is an idyllic world, where there are orcs who believe in shamanism and are based on tribal life and Junnuo people who are peaceful in nature. Noble orcs run in the vast grasslands and take pleasure in hunting. Smart Junnuo people built their own rough cities on towering cliffs and peaks. Kilgardan believes that if they can be molded, they will provide powerful potential support for the Burning Legion. Of these two races, Kilgardan believes that orc soldiers are more easily corrupted by legions. He captured Nero Zu, the old shaman priest of the orcs (later the Lich King). Using Ner 'ozu as a tool, the demons spread their desire for fighting and savage temperament throughout the orc tribe. Soon, the orcs with spiritual beliefs became bloodthirsty races. Kil 'jaeden then drove Ner 'zu and his people to carry out the final step of the plan: to make the orcs devote themselves wholeheartedly to the pursuit of war and death. But Nero Zu felt that his people would be slaves of hatred forever, or refused the devil's orders. He was also hunted for it. After being rejected, Kilgardan found Gourdain, a disciple of Naiozu, who was so happy. Gourdain used a series of means. In the end, except the kind Chief Du Ruo Tan (the father of the orc prophet Sal in the Battle of Chaos), all the orc chiefs drank the demon blood of the demon general Abyss Lord Manojos, so they became slaves of the Burning Legion. The Burning Legion drove them into the world of Azeroth, attacked the Terrans and waged a series of wars. But in the end, because Du Ruo used death to wake up many orcs, the orcs declared a truce and the war between man and beast ended. (Details in the Battle of Warcraft 1)

The birth of the Lich King

After the war between man and beast, Ner 'ozu and some orc shaman priests failed to escape the pursuit of the Burning Legion and the crazy orcs, and were captured by Kilgardan. Kilgardan killed Nero 'zu's body, but his soul was preserved. Kil 'jaeden forced Naiozu to work for the Burning Legion again, sealed Naiozu's soul in special crystal ice, and greatly enhanced Naiozu's soul strength. He threw it in the cold Arctic of Azeroth, Northrend, and let Naiozu plan to weaken the Terran Alliance himself. Later, he sent tichondrius, the most powerful fear devil of the Burning Legion, to monitor Naiozu. Ner 'Ozu claimed to be the Lich King. He used his own will to bring down a plague, killed some immigrants and creatures in Northrend and turned all the dead bodies into zombies controlled by the Lich King's soul, thus constantly expanding the strength of the undead army.

Spider Wars

When Saar liberated his orcs in Lordaeron, Nai 'ozu continued to establish his own base in Northrend. A huge base controlled by the ever-growing undead legion stands on the "Ice Crown Glacier" near his own seat "Frozen Throne". As the Lich King spread his influence throughout Northrend, an underground empire blocked his progress. The ancient underground kingdom established by humanoid spiders sent their elite fighters to attack the ice cap to end the Lich King's occupation of Northrend. To his surprise, Nerazu found that the cave demon was not only immune to his plague, but also could resist his spiritual domination. Spider leaders command a large number of troops and have nearly half of Northrend's underground passages. Their tactics of fighting and running against the Lich King fortress failed the Lich King's efforts again and again. But in the end, Nerazu defeated the cave demon by the war of attrition. In order to make his kingdom unbeatable, the Lich King began his real action. He extended his vast consciousness to human territory and summoned any dark soul who could hear this voice. (The following is the plot of warcraft 3's chaotic rule)

The formation of the necromancer Kel 'Thuzad and the undead plague army

Many powerful creatures in Azeroth have heard the call of the Lich King. One of them, a wizard named Kel 'Thuzad, went to Northrend in desperation, was received and appreciated by the Lich King, and became an undead wizard. After Kel 'Thuzad returned, he established a curse sect that worshipped the Lich King. The curse sect absorbed many people who had lost hope in life, and relied on their efforts to secretly spread the immortal plague in the continent of Nordanren where the Human League was located. In this way, Kel 'Thuzad called the growing undead army "the undead epidemic army".

The disaster in Lordaeron

The paladins tried to investigate the infected area, hoping to find a way to stop the plague. Despite their efforts, the plague still spreads and threatens to destroy the human alliance. Seeing the undead sweeping through Lordaeron, Prince Arthas stepped forward to fight the undead. Arthas succeeded in killing Kel 'Thuzad, but the undead army transformed every soldier killed in the battle and grew stronger and stronger. After being constantly attacked and frustrated by seemingly irresistible enemies, Arthas constantly took extreme measures to defeat his opponents. Finally, his companions warned him that he was losing control of his humanity. Arthas' fear and determination eventually led to his destruction. He went to Northrend to trace the origin of the undead army and wanted to end its threat forever. It never occurred to me that Arthas finally surrendered to the incredible power of the Lich King. Arthas raised the cursed magic sword-Frostmourne, and he believed it would save his subjects. Although the magic sword gave him unfathomable power, it also devoured his soul and turned him into the greatest death knight of the Lich King. After the gradual decline of human nature, Arthas led the undead army against his own kingdom. Finally, Arthas killed his own father, King Tyronas, and led the Lich King's iron hoof to crush Lordaeron.

Sunwell-Fall of Quel 'Salas

Although Arthas defeated all his enemies, he was still haunted by the ghost of Chersu Zadeh. The ghost told Arthas that he would be resurrected for the next stage of the Lich King's plan. In order to resurrect Chersu Zadeh, Arthas will carry Kel 'suzadeh's body, the Sun Well in Quel 'Salas, the capital of the high elves. Arthas and his undead army invaded Quel 'Salas, besieging the fragile defenses of the high elves. General silver moon Ranger followed Silvanus and bravely resisted, but Arthas finally destroyed the high elf army and successfully reached the Sunwell. Under his cruel command, the body of Silvanus, who was chasing the wind, was resurrected as a banshee, which made her suffer endless curses and obey the conqueror of Quel 'Salas forever. Finally, Arthas submerged Kel 'Thuzad's body in the holy water of the Sun Well. Although this action polluted the eternal water, Kel 'Thuzad was reincarnated as a lich. Kel 'Thuzad, who was more powerful after his resurrection, explained that this was the next stage of the Lich King's plan. At the same time, Arthas and the undead army marched south, and none of the high elves in Quel 'Salas survived. The home of the high elves, a prominent kingdom that has been established for more than 9 years-Quel 'Salas, is completely extinct.

Archimonde's return and his journey to Kalimdor

When Kel 'Thuzad was fully recovered, Arthas led the Immortal Corps south to Dalaran. There, the Lich can get Medivh's powerful magic book, which can send Archimonde, the commander-in-chief of the Burning Legion, back to earth. At that time, Archimonde will personally lead the Burning Legion to complete the final invasion. Soon, Kel 'Thuzad was ready to cast spells. After some tossing, Archimonde was finally transmitted successfully. But in the end, the army of the Burning Legion led by Archimonde was defeated by the coalition forces of Terran, Orcs and Night Elves in the Battle of San Shanhaigar, and Archimonde was also swallowed up by the violent energy of the world tree "Nota Hill". (The story of chaos ends and the story of the frozen throne begins)

The rise of the blood elves

The immortal natural disaster completely transformed Lordaeron and Quel 'Salas into a poisonous plague land. Only a small alliance resistance remained. One group is mainly composed of high spirits, led by Kael'thas, the last prince of Quel 'Salas dynasty. Kyle, himself a wizard with extraordinary powers, gradually realized the failure of the alliance. The high spirits feel sad for the loss of their homes, and to show respect for the people who died, they decided to call themselves blood elves. Despite their desperate efforts to defend against natural disasters, it is very painful for the blood elves to cut off contact with the sun well that gives them magic. In order to satisfy the people's dependence on magic, Kyle joined the demon hunter Yullian (also translated as Illidan) and his Naga. With the help of the combined forces of Naga and Blood Elves, Illidan gathered strength and launched an attack on the Lich King and his ice crown based in Outland.

Plague Land Civil War

Nero Zu, the lich king, knew that his days were numbered. In the imprisonment of the frozen throne, he suspected that Kilgardan would send someone to destroy him. Illidan's powerful spell damage has broken the frozen throne, so the power of the Lich King is weakening. To save himself, he summoned Prince Arthas, the death knight. Although his own strength gradually faded with the weakness of the Lich King, Arthas provoked the civil war in Lordaeron. At this time, half of the immortal army led by Silvanus took a coup, broke away from the control of the Lich King, and took control of the immortal empire of Lordaeron in one fell swoop. At the call of the Lich King, Arthas was forced to leave Lordaeron in charge of Kel 'Thuzad, and the war spread throughout Lordaeron. Finally, vanas in western Europe and her rebel undead army (known as exiles) occupied the abandoned capital of Lordaeron. Building their own fortifications on the ruined city, Silvanus vowed to drive Kel 'Thuzad and his lackeys out of the continent. On the other hand, decided to save his master, weak Arthas arrived in Northrend only to find that Illidan's Naga and the blood elves were waiting for him. He and crypt lord Agola wanted to rush to the Ice Crown Glacier to defend the frozen throne, and Illidan's troops were on their way there.

The Lich King won

Even though he was very weak, Arthas reached the throne of ice before Illidan. In a fierce battle under the frozen throne, Illidan lost to Arthas and was defeated by Arthas because the Lich King gave all his remaining strength to Arthas. Arthas used Frostmourne, the magic sword in his hand, to split the ice prison that trapped the Lich King, and thus released Ner 'Ozu's enchanted helmet and breastplate. Arthas wears a helmet with incredible power and becomes the new Lich King. The souls of Nerazu and Arthas merged together and became extremely powerful. As Nero Zu expected, Illidan and his troops fled back to Outland in a hurry. Arthas became the most powerful monster in the world. Arthas, the new immortal lich king, lived in Northrend and devoted himself to the reconstruction of the old nest of the ice crown. His right-hand man, crassus Gard, led the immortal natural disaster in the plague land. Sylvanas and the exiles are holed up in the land of Trisfrin, which is only a small part of the kingdom divided by war.

(The story of Warcraft ends and the story of World of Warcraft begins)

If LZ wants the background of the undead in World of Warcraft, just ask.