Seeing inside of the throne there is the person who is sitting down on the throne revealing is.....

Fatui Master.

Fatui Master! The Big Bad and Leader of Fatui!

Seeing of the two persons entering inside of the throne, revealing is two of his Harbringers. Le Signora and Scarmouche

Le Signora

Scaramouche

Fatui Master: Report.

Scaramouche: Yes, Master just everything you predicted for..... The Dragon Knight has arrived in this world..... *stated*

As the Fatui Master remained in silence, before he broke into silence releasing of the evil laugh in sinister.

https://youtu.be/Uj4qRimdJkc

Fatui Master: At last! After thousands years ago, now that boy is the key of everything!

Scaramouche: Master, why not we eliminate him. He is the thre... *cut*

Fatui Master: Ohhh.... My dear boy didn't you know. He will lead us to the remaining other Seikens soon we will make our world in our imagines and steal the books from the Chronicles! *evil grins*

Making them to be forms the evil smirks.

Le Signora: Master.... What about the mystery Dark Knight? He has wielding the Sword of Darkness.

Fatui Master: Leave that to me... Now all of you guys find the remaining sevens steals their Gnosis. Later... We will take down on the boy with the Seikens. *Smirk*

Le Signora: Yes.... But what if he too strong to us?

???: Leave that to me.... *Cold tone*

Making them to be startled to be bit.

Hearing the sound from the footsteps, making her turns toward at someone wielding of the sword while Scaramouche bow down in respect. While Le Signora blush with smiles.

Fatui Master: You remember my right hand man, the executioner who killed everyone try to get in our world. The first user use the Vision known as Time. Jakob. 

Le Signora: Jakob sama~ *Smiles in blushing*

He looks at her with the stern looks on his face and wielding the sword is the Sword of Time one of the missing Seiken!

(Ignore Wonder Ridebook)

.....

Seeing of Dragon Knight attempted to attack Le Signora when she attacked Lumine and Venti but blocked by someone else. Revealing is Jakob.

Jakob: I believe it enough for you. *cold tone and slash at Dragon Knight*

Making him stumbled back.

Le Signora: Jakob sama~ *Smiles and blush in relief*

Dragon Knight: Who are you?! Why did you have the Sword of Time?! *demanded tone*

Jakob: My name is Jakob..... I believe this sword does belong to me over my family generations. I am the one of Fatui Harbringers as Zeroth. 

Seeing he summons the armor.

Jakob: I summons the Time Master! 

He transformed as Time Master!

Time Master: Call me Time Master. *cold tone*

.....

Seeing of Dragon Knight charging at Time Master, suddenly Time Master vanished in sight in front of Dragon Knight before he would swing his sword slash him.

Dragon Knight: He vanished? *Shock tone*

Suddenly he felt the horizontal slash on his back, as Dragon Knight turns facing at Time Master, before he could slash him but Time Master vanished, and attack him behind him. Dragon Master unable to keep up in time when Time Master teleported attack him.

Dragon Knight: He can teleport?! *Shock and realization tone*

.....

Seeing of Dragon Knight's friends from his worlds has team up alongside with Jean, Keqing, Mona, Diluc, Zhongli, and Venti fight against on Time Master before they could fight .

Lion White

Sacred Knight

They let out of the charging and battle cried, before they're jumps in midair charging at him until then...

Time Master: Time Froze!

He just freeze in time, seeing of Time Master walks calmly before he slashing on Dragon Knight as he screamed in pain. 

....

Seeing of Time Master turns his Trident into Sword mode, he give a few swing to reversing back in time to revive of his allies.

And seeing he swinging his sword in forward to summons and multiple of his own allies against on Dragon Knight and his team.

....

Jakob: Why did you let them go, Tartagalia? *cold tone*

He asking on Childe aka Tartagalia a member of Harbinger 11th.

Childe: It wouldn't be fine and let that guy keep the sword, right.

Jakob: Hmmm.... Indeed. 

.....

Seeing of Time Master placing his trident stabbing on the ground, before he turns facing at reader before points his index finger.

Time Master: Your time is up....

He pulls out his trident to remove stabbing from the ground, before he spinning around before slamming the handle on the ground to freeze in time.

The Dimensional Dragonic Knight

New Enemy: Time Master the Zeroth of 13 Harbringers