Seth has spread his clones all throughout the castle and has had them shapeshift into guards so there won't be any Asgardian casualties. He won't actually be hurt but he will pretend he is hurt.
Loki is sitting in his cell tossing an object up and down when he hears a strange noise.
The noise was that in the cell across from him the Dark Elf had taken the item from his side and crushed it and he began to change. He got larger and larger and grew horns from the top and bottom of his head and when the transformation was done he exploded in fire and turned most of his cellmates to ash.
The ones remaining he beat up and held the last one against the cells energy field and watched as the Asgardian guards(Seth's Clones) aimed their weapons at the Elf. The Elf then punched with his other hand onto the energy field and it dissipated. He then came out and started killing the guards except one such guard slowly transformed until Seth was standing in front of him.
While the Elf didn't know who he was, Loki did. Loki saw Seth appear and was stunned.
"You!! How are you here, on Asgard?!?!?"
"Obviously I received an invite." Seth said to Loki with a giant grin.
[Now it's time to have some fun with him.]
Seth slowly became completely covered in his new metal composite that he still hasn't named yet and for good measure, he slowly transformed with the Hulk's power but again made him more lean than bulky.
He was attacked by the juiced up Elf and saw that there wasn't a scratch on him and he was matching him blow for blow and the beast couldn't do anything to him he knocked him around like crazy and eventually got bored of fighting it, and unfortunately he had to let it go free and kill Frigga as it was important for the future of both Asgard and Loki. He wished he could change it, but he can't.
Anyways, back to the clone. Seth made the clone "accidentally" miss an attack and got the Elf to grab the clone and melt it to ash. iys a good thing Seth cut his connection to the clone otherwise that would've really hurt.
Loki was really happy that the nuisance of his finally died and he saw that the beast was letting all the prisoners out and when he got to Loki he just stared at him and walked away. Loki was in a particular good mood because of what he saw happen to Seth so he said to the beast.
"You might wanna take the stair to the left."
The beast growled, but listened to him. Loki then watched as all the guards somehow had the power to teleport and had metal claws and killed all the escaped prisoners and walked right past Loki's cell during which, one of the guards winked at Loki.
Loki was confused by the action, but decided to write it off as a guard being smug that Loki wasn't freed like the others.
Thor heard the alarm for the prisons and he flew towards the fight and joined the other guards and Volstagg and Fandral in taking down the prisoners.
During this time Frigga has taken Jane into her Chambers on Odin's orders and is meant to keep her safe. Heimdall stands watch and he senses a ship that is flying past the Bifrost gate. Heimdall rushes after it and takes it down and it crash lands on the bridge only to turn around and see another larger and much more dangerous ship appear which launches smaller ships from it.
———————————————————————
(Meanwhile in the skies outside the castle)
Seth is floating in the air and he sees the ship being taken down by Heimdall and the larger ship appear and the smaller ships heading towards the castle.
[Hahahaha this is gonna be fun. Time to strafe the skies.]
Seth's eyes become white and there is the crash of thunder and the flash of lightning as storm clouds begin to form all throughout Asgard. Tornados form and crazy winds with snow are shown all through the sky in front of Seth and lightning strikes down on the ships flying towards the Palace about three or four ships got hit with the lightning strikes and the rest were dealing with the tornados and crazy winds. While that was happening, Seth also flamed on and flew around until he created a supernova tornado and used Sue's power to contain it and he did it a couple of times and was able to do it in different areas using his teleportation and used his telekinesis to send them all through the sky.
Odin looks at what's happening from a balcony in utter fascination and thinks to himself.
[He was actually undercutting the true strength he had. I thought he was simply bragging, but I guess he was actually being humble. It is like seeing a battle between Elder Gods right now.]
Some Asgard ships started to fly out, but with a wave of his hand, Seth stopped them and then moved them down to the ground. The guards were confused at first and then thought that maybe he was betraying Asgard. That thought lasted until they had another thought in their minds, although this one wasn't their own thought.
<
There were some sounds of cheering throughout the city and the Asgardian ships were now abandoned. Seth used Magneto's powers and lifted the Asgardian ships and then morphed the metal into a giant metal shield which he placed behind him around the whole palace and then he placed his own force field in front if it. Just as he was beginning to feel he was making the defenses overkill, he saw the shield generators activate.
This caused him to remember what happened to the shield in the movie and he now felt that what he did was justified. He was also very shocked at the moment as he felt that he should have exhausted himself by now with how much he was using his powers, but he felt as if he hadn't been draining his power at all, as if he was getting this power from somewhere else.