The crossover is between two TV shows and two games:

shows are Merlin and Legend of the Seeker (the action happens after both TV shows ending)

games are Age of Mythology and Age of Mythology: The Titans (the action happens after ten years of Age of Mythology)

I add the Imperial Order content after the splitting of the worlds

So in chapters 1-10 happens in 455 A.D. and from chapter 11 to end with ten years after Trojan War ended.

Legend of the Seeker is a television series based on novels series. The novels are in the series titled The Sword of Truth by Terry Goodkind. The sow distributed in the U.S. by Disney-ABC Domestic Television. It premiered on November 1, 2008, and ran for two seasons before its cancellation in 2010.

Synopsis season 1:

The series follows the journeys of a long-awaited "Seeker of Truth":

The main characters are:

a Seeker, Richard Cypher (Craig Horner),

a Confessor named Kahlan Amnell (Bridget Regan),

a wizard named Zeddicus Zu'l Zorander (Bruce Spence), and

a Mord-Sith named Cara (Tabrett Bethell)

They defend the people of their realm against tyranny and destruction.

Synopsis season 2:

Richard Cypher discovers the death of Darken Rahl caused a tear in the veil. The veil spilt the land of the living and the Underworld known as the land of the dead. Kahlan learns she is the last living Confessor. In the group, Richard Cypher, Kahlan Amnell, and Zeddicus Zu'l Zorander, joined a Mord-Sith, Cara.

The only way to close the veil is to use Stone of Tears, used by the Creator, to close the veil at the start of creation. The group searches for the stone, overcoming many obstacles along their journey.

Heroes from Legend of the Seeker:

1) Leo Dane

Shota learned Richard Cypher, would fail in his quest against the Keeper. She also saw a glimpse of next Seeker, Leo, who was then a blacksmith. Sisters of the Light took Richard to the Palace of the Prophets because cannot control the magical powers. Zedd naming a new Seeker, temporary and Shota showed Leo. Leo became the seeker for a short time because he sacrifices to save Kahlan.

2) Richard Cypher aka Richard Rahl

Richard was born in Brennidon, before Darken Rahl's army massacre of all first-born sons. Luckily, Zedd took him across the boundary to the Westland. Zedd then gave Richard to the kindest couple in Hartland, who was George and Mary Cypher. Also, they had a son named Michael. Richard Cypher was once, but a simple woods guide in his hometown of Hartland. Zedd will make him Seeker. His first mission was to stop Darken Rahl, find all three Box of Orden, alongside the Book Of Uncounted Shadow and kill Rahl. After Darken Rahl's death, he will discover his brother was Rahl. D'Hara needs a leader, but he refuses it because he must find Stone of Tears and seal Keeper in Underworld.

3) Cara Mason

Mord-Sith chose Cara to become a Mord-Sith as a young -Sith subjected all candidates to the three breakings. During training, she was tortured in many ways. Lord Rahl of D'Hara, Darken Rahl, forced Mord-Sith's being loyal to the reigning. Rahl expected total obedience of his Mord-Sith and beat and rape Cara and her "sisters". After his death, the Mord-Sith betrays Cara and wants to kill her. Cara becomes the protector of Richard Rahl and Kahlan Amnell.

4) Kahlan Amnell

Kahlan Amnell was the Mother Confessor of all the Midlands and, later, the wife of Richard Rahl. After the rise of Darken Rahl, Kahlan ventured across the boundary to Westland to find Zedd. Along the way, Kahlan and Richard fell in love. Kahlan's mother died of a terrible wasting disease and her father broke free from confession. He took Kahlan and her sister Dennee and forced them to use their powers to do his bidding. After a while, another Confessor found them, took them away from their father, to Aydindrill to become Confessors.

5) Zeddicus Zu'l Zorander, known as Zedd

Born before the outbreak of the D'Haran War, to gifted parents, Zeddicus Zu'l Zorander became known as a prodigy. Panis Rahl makes Zedd Wizard of the first order. The gift was stronger in him than either of his powerful parents. As a result, he could breach shields in the Wizard's Keep that even the old wizards who taught him could not pass. As a young boy, Zedd discovered before unknown parts of the ancient Keep. While still was young, Zedd married the love of his life Erilyn Zorander with whom he fathered a daughter. He is the grandfather of Richard Rahl and Darken Rahl.

6) Dennee Amnell

Is the young sister of Kahlan Amnell and went to the Boundary being chased by a D'Haran squad. They shot Dennee with an arrow and made Kahlan promise she would continue on the mission to find Richard. Later, Kahlan and the others found the surviving Confessors, along Dennee, in a D'Haran prison. Kahlan and Richard broke her out of the prison and discovered she was heavy with the child. Dennee soon gives birth to a baby boy. After birth, her with the rest of confessors leave to a magical Island. Rahl forces attacked the island, and she died in battle. Later, she will return but in a body belonging to a wanton from a brothel.

7) Shota

Shota was a powerful witch, lived in a beautiful place surrounded by forest in the Agaden Reach. The forest was full of vicious creatures and almost living vines. All knew her name in the Midlands because existed rumors that wizards feared her wrath.

8) Denna

Denna was the Mord-Sith. Her first task was the capture Richard Cypher to train 's love for Kahlan Amnell escapes the effects. Both escaped the Mord-Sith temple after Richard killed Denna. Constance revived Denna with the Breath of Life. Her second task is to find the ungifted one, Jensen Rahl to take the third Box of Orden. Again, Denna succeeded, but the Seeker stop her.. Later, she trained a D'Haran general, to put his soul in Richard's body. She failed because of the intervention of Richard's friends.

9) Sister Nicci

Nicci was a young novice of Sisters of The Light and a man raped her. After she didn't receive justice, she killed the man and joined the Keeper. When Richard she told about Prelate's lies and convinced him to give her the magical power. After she escaped from prison attempted killing protagonists. Zedd and Richard worked together and killed Nicci with her magic. Corsha sacrificed her life, and the others brought Nicci's spirit into the new body. Her Sisters betrayed Nicci, and she decided to serve herself. Nicci caught up with Zedd, Cara, and Kahlan, and absorbed enough of Kahlan's Han to confess her with her magic. She was the one who fulfilled the Creator's newest prophecy and blinded the Seeker. Cara killed her, and her last command was Kahlan to bring the Stone of Tears, but things did not go Nicci's way.

10) Darken Rahl

He was a ruthless tyrant who sought to take over the Midlands. Was a prophecy that a Seeker born in Brennidon would kill him.. Darken Rahl found the Seeker lived and sent his armies to take the Book of Counted Shadows and kill the Seeker. Later, Darken Rahl died by Richard's hand and became a servant of The Keeper. Rahl defected to help Richard Cypher, who had brought him back to life, only to trick him. He has to find the last Night wisp, to read the scroll which has the instructions on how to use the Stone of Tears.

11) Verna Sauventreen

Verna brought Richard to the Palace of the Prophets and helped him escape. She fulfills the prophecy after the revelation of the Sisters of the Dark living in the Palace. Verna almost killed prelate of Sisters of the Light Annalina. As a result, they banished from the order for a short time. When returned, she became the prelate of the Sisters of the Light.

12) Annalina Aldurren known as Ann

Annalina Aldurren was the Prelate of the Sisters of the Light for eight hundred years. Before faking her death and handing over the title to Verna Sauventreen. Annalina was a strong believer in Prophecy. So she instructed all the Sisters not to tell Richard about the Wizards Web that slows time in the Palace down. The Prophecy said, Richard's failure in his quest to defeat The Keeper. So, for fear that he might leave and continue on his quest, and then the prophecy would come true.

13) Sisters of the Light

The Sisters of the Light were a group of sorcerers dedicated to the Creator and ruled by the prelate. The sisters lived in the Palace of the Prophets in the Old World. Their duty was to train young Wizards on how to use their gift when there was no other alternative. The Sisters all dressed in red dresses with matching red veils they wore over their faces most of the time. The Prelate wore a light shade of pink. Sisters of the Light serve the Creator.

14) Order of Confessors

The Confessors were an order of women first created during the Great War. They had to determine the truth beyond doubt. Created by a Wizard using an all-powerful set of tools called the Sharkiah. The first Confessor was Magda Searus. The magic of the Confessors destroyed the person touched by their power. They lost their sense of self. They submit their lives to the Confessor, and would do whatever they commanded. The Confessors instigated as the rulers of the Midlands. The Mother Confessor, acted as the First Chair of the Central Council in Aydindrill. Most powerful confessors can use powerful magic named Condar or the Blood Rage.

Villains from Legend of the Seeker

1) Giller

Giller was a wizard of the Second Order. Was Zedd's student and Mother Confessor Kahlan Amnell assigned protection. He betrayed the order of Confessors and ally with Darken Rahl.

2) Nicholas Rahl

He is the son of Darken Rahl and Kahlan Amnell. Nicholas Rahl, aka "Master", born into a world where Richard and Cara traveled 50 years into the future. Their disappearance left the world to live without its protector. He is a male confessor. They must die when they are born because being unable to control their powers and became mad. Condar of male confessors is not as strong as woman confessors.

3) Sisters of the Dark

They are the same as the Sisters of the Light, but the only difference is:

They serve the Keeper, known as the Master of Underworld

They use Dacra like Sisters of the Light, but they can steal han from somebody and become more powerful.

4) Banelings

Baneling is an agent of the Keeper and comes in many forms:

Sisters of the Dark

Darken Rahl

Baneling (who receive Keeper's offer, kills every day, and to prevent their return, must destroy them, you need to burn their body)

5) Keeper

The Keeper had a relationship with the Creator, but he grew jealous of her children. He betrayed the Creator, by creating death and releasing it to her children. The Creator wept for days without end, a Stone made from her tears. So she used its power to seal the Keeper in the Underworld for eternity. When the veil broke, Keeper unleashed his banelings and other creatures in the living's land. As the Keeper of the Underworld, he is a being of immense power.

6) Army of D'Hara

7) Mord-Sith's aka the Sisters of the Agiel

The Mord-Sith are an elite group of women warriors originating from D'Hara. They defended the master of D'Hara, Lord Rahl, from creatures or people with magic. Mord-Sith selected from the gentlest and kindest girls in D'Hara. Each girl is "broken" by three steps:

Tortured to the point of obedience so strong that she would do anything her mistress tells her. This part of the training breaks her of her sense of self and personal desires.

Forced to watch as her teacher tortures her mother to death. This is to break her of compassion

Gave the Agiel and inflicting pain and suffering upon killing somebody

Mord-Sith's can:

redirect the magic of anyone who uses magic against her

endure a heavy amount of damage thanks to their training

use the Agiel to inflict pain on their opponents, which can kill them

can use the Breath of Life to revive a dead body and the person revives in perfect condition. Yet, this only works if the body is still warm.

If a Mord-Sith becomes a Baneling, they cannot use the Breath of Life. If Confessor confesses a Mord-Sith, they will die a slow and painful death. This makes Confessors and Mord-Sith mortal enemies.

8) Jagang

Jagang was the Emperor of the Imperial Order and the first dream walker born since the great war. He used this innate ability to enslave Sisters of both the Light and Dark. He forced them to use their powers to further his causes. Jagang believed in the ideals of the Fellowship of Order. As a result, he allowed his soldiers to brutalize and rape innocents as they saw fit. Nicci captured him and used a Rada'Han killing him as planned Richard.

9) Narev

Narev was the high priest of the Fellowship of Order and the spiritual leader of the Imperial Order.

10) Imperial Order

Emperor founded the empire through the Fellowship of Order by Brother Narev. The Order taught mankind was evil and full of selfish desires. Jagang brings his ideals to the Old World and united kingdoms under his controlled rule.