After the Titans sealed the Elder Gods, a creature known as the Ancestral Dragon appeared on ancient Azeroth, and Galakron was the most powerful of them all, hundreds of times the size of the ordinary Ancestral Dragon. Over time, it began to devour its own kind, even dead corpses, and became infected with necromantic powers. The Titan Guardian Tyr believed that it was a great threat to the world, and he summoned the five most intelligent Ancestral Dragons of the time to assist him, Ysera was one of them, and in the final battle, these five Ancestral Dragons successfully killed Galakron through the cooperation of wisdom, and the Titan Guardian was surprised by the strength and courage shown by the five Ancestral Dragons, and decided to give them the duty and power to protect Azeroth, so Ysera merged with the Emerald Dream and gained the power to control nature and became the guardian dragon, Azeroth has since entered the age of the Dragon's Guardian.

Some believe that Freya has woven the entire Emerald Dream out of thin air, while others claim that the wonderland originally existed in other forms, the dream of the sleeping star spirits of Azeroth. It is said that Freya pioneered this realm and created the Emerald Dream Realm in the future, which served as a bridge to the newborn Titans.

The Emerald Dream is a mirror world of Azeroth, parallel to the whole of Azeroth, independent of the real world but intimately connected to it, not even Ysera can control or shape the Emerald Dream, which retains the original appearance of Azeroth, the land is beautiful and pure—with churning hills, dense jungles, and vast grasslands. The Emerald Dream and the real-life Azeroth interact with each other, and in the Emerald Dream, the Green Dragons and the Druids heal the wounds of the planet, regulating the natural balance and biological evolution of the world.

Even though the Emerald Dream Realm was connected to the physical world, it was still too strange and bizarre for the mortal mind to be compatible with each other. However, by channeling druid magic, some mortals can experience the Emerald Dream in a sleeping state and change the scenery as they please—but that said, the traces are not permanent.

After the Age of the Dragons, many civilizations were founded by short-lived mortal races in Azeroth, with the powerful Troll Empire defeating the Chira Zerg Empire and the rising Night Elf civilization. It wasn't until 12,000-11,000 years ago that the young Cadore founded the most powerful Night Elf empire of the time, and they inhabited the Well of Eternity, the power fountain left behind by the Titans, and developed a powerful arcane civilization. However, the elves' misuse of magic attracted the attention of the Burning Legion, and the War of the Ancients broke out.

The Fallen Titan Sargeras, the Pantheon's most powerful warrior, is now dedicated to destroying all interstellar order, and the Burning Legion he has assembled is drawn to the powerful magic of the Well of Eternity and is determined to make Azeroth his next target for destruction.

The dragon watched over the young Kadore, and after believing that their actions had caused the demon legions to threaten the world, a meeting led by the guardian dragon took place in the Temple of Dragon's Sleep. All the dragons participated in the gathering, and with the exception of the mysterious Nozdorm, the Guardians of Time were trapped in the long stream of time.

At this gathering, the Guardian of the Earth, Nesario, offered to create an artifact of the Dragon Legion, which would gather the best of all dragons, and the five-colored dragon would use this artifact to wipe out all the demons that invaded Azeroth, which Nesario named the Dragon's Soul. The artifact was so delicate that even the guardians of magic were impressed by it, and the Guardian of Life supported the powerful and steady Nesario, for the black dragon, like the land he guarded, had always been the most calm and trustworthy leader of the five-colored dragon legions.

However, what the Guardian Dragons did not know was that the Guardian of the Earth had gone mad in the whispers of the Old Gods day and night, and that he had created the Dragon's Soul to crush all the lowly races and opponents within the Dragon Legion. So, when the dragons flew to the battlefield to aid the Night Elves fighting the Burning Legion, Nesario mercilessly threw the power of the Dragon's Soul at both sides of the war.

The rest of the dragons quickly noticed something unusual, and the Blue Dragon Legion was the first to fight back, weaving arcane energy in the air to attack the Earth Guardians, only to be crushed by the savage power of the dragon's soul. Malygos, the Guardian of Magic, was knocked away by the Dragon's Soul's mighty force, the rest of the Blue Dragons were slaughtered, and the Colorful Dragons fled in all directions, no dragon could compete with the power of the Dragon's Soul, as it contained the best of all dragons, even the faceless Nozdorm was given his power by his spouse.

The Night Elves play an important role in the rest of the story, when the young Druid Malfurion stole the Dragon's Soul from the Black Dragon's lair, only to be snatched by the High Elves, who had already joined the Burning Legion with their queen Azhara. The High Elves want to use the power of the Dragon's Soul to open a portal in the Well of Eternity that will allow the Demon King Sargeras to pass through.

The decisive battle begins above the Well of Eternity, and the guardian dragons, who have long been scattered and dodging, finally appear on the battlefield, because if Sargeras is allowed to pass through the portal, even the power of all dragons will not be able to stop the fallen titan. Alexstasa and Ysera tried to dismantle the dragon's soul and prevent the portal from opening, but they couldn't. At this time, the already frantic Nesario appeared, desperate to reclaim the dragon's soul, allowing his furious power to tear at his body.

In the aftermath of the War of the Ancients, the three guardian dragons cast a spell on the dragon's soul, making it impossible for the dragons to use the terrifying weapon and hiding it in a hard-to-find place.

In the face of the devastation of war and the shattering of the dragon legions, the dragons realized the meaning of the existence of the mortal race. Alexstrasza planted the first World Tree, Nodashir, on the top of Mount Hygar, the sacred mountain of the Night Elves. The three guardian dragons blessed them, and in reward for Kadore's bravery in the midst of the catastrophe, Alexstasa bestowed upon them an eternally strong body, and as long as Nodashir remained, the Night Elves would never be trapped by disease; Ysera gave the elves the right to walk in the Emerald Dream Realm, and the Night Elf druids were allowed to share the dream world with the Green Dragon Legion, but the druids must also take on the responsibility of repairing the world's wounds in the dream world; Nozdom bestows the elves with eternal lifespan, time will stand still in the Cadores, and the Night Elves will live as an immortal race as long as Nodashir stands.

The legend of the Night Elves records that the moon god Elune and the white deer Malorne gave birth to the demigod Cenarius, and Ysera only regarded Cenarius as her own son, because when Cenarius was born, the Emerald Dream was touched, so Ysera paid attention to Cenarius and raised him.

Under Ysera's guidance, Cenarius founded the Druid Sect, and the Night Elf Malfurion Fury became the first Druid. After the War of the Ancients, Malfurion forbade the Night Elves from using arcane magic for fear of the calamity caused by the Night Elves' excessive use of magic, so more and more Night Elves joined the Druid Order.

The druids entered the Emerald Dreamland, where they watched over the life and reproduction of Azeroth and maintained the balance of nature. However, not all dreams are so sweet, and over the years, the druids and the guardians closest to nature have gradually discovered that some unstable existence has emerged in the dreams - nightmares, stimulated by the Legion and the Nightmare King Savis, the spreading corruption is now gushing out, and is turning the Emerald Dream into a suffocating and terrifying realm that if it is not cut off from its source, all of Azeroth will be surrounded by it. Since then, the Green Dragons, led by Ysera, have been engaged in a protracted tug-of-war with the Druids against the Nightmares.

In the original book, when the cataclysm came, Ysera the Sleeper stepped out of the Emerald Dream and became an Awoken, and went to Mount Hyjal to lead the druids to heal the World Tree Nodashir and resurrect the demigods.

After this, Ysera saw a foreshadowing of the future in her dreams: when the Twilight Judgment came, the dragons would all die at the hands of Cromatus, and every dragon king would die next to the Temple of Dragonsleep, and even the body of Deathwing would be stuck at the top of the temple.

Together with Alexstasa, Karegoth, Nozdorm, and Thrall, Ysera defeated Nefarian's creation, the Colorful Dragon Cromatus, and although Cromatus was dead, the Dragonlords had no way to destroy Cromatus' corpse and had to be temporarily sealed, while Isera stated that the true Twilight Judgment had not yet arrived......

In the end, the four guardian dragons and Thrall killed Deathwing in the maelstrom, and in this battle, the Titan power of the dragon kings was also depleted, ushering in the end of the dragon age.

But this is not the final ending, with the invasion of the Burning Legion again, the Nightmare King Savis returned, he once again polluted the Emerald Dream with Nightmares, many druids were corrupted by the Nightmares, even Cenarius did not escape the corruption of the Nightmare, Malfurion Fury lost his mind because Cenarius was corrupted and corrupted by the Nightmare King Savis, and went to track Savis alone, Ysera feared for Malfurion's safety and followed.

However, everything was a trap for Savis, who caught Malfurion and struck Ysera with the corrupted artifact Elune's Tears, which entered Ysera's body and corrupted her. Later, Savis took Malfurion and asked the fallen Ysera to destroy the Temple of the Moon, and the belated Tyrande Yufeng chose to stop the fallen Ysera first and then rescue his lover.

Eventually, the fallen Ysera was struck down, and before she died, the moon glowed with a miraculous beauty that took Sera's soul away. At this point, the guardian dragon Ysera has fallen.

If you do the math, Ysera is already the third guardian dragon to officially fall.

It was Malygos at first, who had lost his wife and children in the Battle of the Ancients, as well as a large part of his people, and the blow had thrown the old dragon's mind into disarray. He regarded all the creatures he could see with his eyes as enemies, and it was only after he inadvertently absorbed a little of the essence of the Void Dragon that he finally regained his senses. Unfortunately, when he regained his senses, he wasn't ready to serve Azeroth again, or rather, he was going to change his routine.

He thinks that all creatures who abuse magic deserve to die, so he wants to use the demon hub to completely control the demon king and destroy all magic-related substances. His behavior is undoubtedly a threat to the whole world. Even Alexstrasza, the Red Dragon Queen, couldn't stand it anymore, and the Red Dragon Legion teamed up with Kenrito, with the help of the Foot Man, to finally kill Malygos.

Fortunately, Crassus saved a large number of blue dragon eggs during the Battle of the Ancients, and these blue dragon eggs were preserved intact, and finally hatched a new blue dragon, which allowed the blue dragon clan to avoid the danger of extinction.

Malygos was the first guardian dragon to die.

Then the second one, undoubtedly, is the Deathwing Nesario, this black dragon boss, should be regarded as the most determined of all the guardian dragons, but unfortunately it is such a determined existence, but in the end it was driven crazy by the whispers of the ancient gods. Not only did he sneak up on other dragons, but he even completely reshaped the world of Azeroth from the vanilla version described in Warcraft's history later in the books. He divided the barren land in two. The waves he unleashed changed both continents. He even used his flaming claws to leave a terrifying mark on the top of the fortress at the head of Stormwind, and used it as his personal signature for the Union capital and its people.

However, he still couldn't escape death, and when Deathwing led his army of destruction to besiege the Temple of Dragon's Sleep, Thrall used the Dragon's Soul, which gathered the power of the four guardian dragons, to attack Deathwing, but even the dragon's soul's powerful power could not penetrate Deathwing's essentia armor, but it also hit Deathwing's hard.

The Hind Feet then destroy Deathwing's essentia armor, and Thrall attacks Deathwing again. The golden glow of the dragon's soul pierced through Deathwing's body, and the Worlddestroyer plunged into the maelstrom.

However, due to the blessing of his ally Elder Gods on Deathwing, Deathwing has transcended the cycle of life, and death alone cannot stop Deathwing's madness, and only by completely destroying him from his source can he truly kill him.

Even after being struck through the heart by the dragon's soul, Deathwing was not destroyed, and he crawled out of the maelstrom, completely out of his mind, but because of the power bestowed by the ancient gods, his limbs and wings twisted into tentacles, clutching at the rocks around the whirlpool, in a vain attempt to lead the second cataclysm to completely destroy everything in this world.

The other four guardian dragons fought hard to stop it, and poured all their power into the dragon's soul, which combined all the power of the four dragon kings and the power of the earth that Thrall had obtained with the power of the shaman, and turned into a golden dragon guarding the dragon's heart, and rushed into Deathwing's body.

Eventually, the invincible Destroyer disintegrated into a golden powder god-like corpse in the face of the dragon's soul's power, leaving only the corner of essentia's jaw, the only proof of the existence of the Fallen Guardian Dragon.

And now, the female night elf who appeared in front of Duten, Ysera, if nothing else, will become the third guardian dragon to die in the future.