Hiemdall's Observatory
The three emerged from the Bifrost to find Heimdall slumped over his controls.
"Get him to the healing room! Leave Laufey to me." Loki said.
Loki bolted out the door.
Odin's Chambers
Odin lay in the Odinsleep, Frigga at his bedside. She heard the shouts of Guards outside, the sound of a battle. Frigga grabbed a sword.
A Frost Giant burst in. She swung the sword around hard, cleaving into his shoulder. He swatted her aside angrily.
Laufey and the Brute Frost Giant enter.
Laufey looked at Odin lying helpless on the bed.
The Jotun king stood over the unconscious Odin, relishing the moment.
He formed an ice blade.
Laufey stood before the sleeping Odin.
"It's said you can still see and hear what transpires around you, even in this state. I hope it's true, so that you may know your death came by the hand of Laufey.
He raised his blade above Odin's body, when -
A blast of energy Hit him from behind. As the Jotun king fell to the ground, it was Loki who struck him down with Excalibur.
"And your death came by the son of Odin." Loki said.
Laufey escaped the room as the other two shocked Frost Giants moved for Loki. Kuri shimmered in and blasted fireballs at one, taking him out.
The Brute was nearly upon him, when the Jotun stopped suddenly, his eyes going wide. The Brute fell to the ground, revealing Frigga Standing behind him - the sword stuck in his back. She looked to Loki, takes him in her arms.
Kuri looked at Loki. "We have to get back to the Observatory. Laufey lives."
She took his hand and they shimmered, meeting Thor at the Observatory.
Heimdall's Observatory
Laufey operated the Observatory's controls. The massive turret spun, pointed.
"Midgard," gasped Thor as the Bifrost roared to life.
Loki entered, shielded his eyes from the brilliant light of the Bifrost energy blasting towards Jotunheim.
He looked over to the controls, sees that they're frozen in an enormous block of ice. Laufey stands atop it.
"All these years, and no one's ever dared to use it as a weapon." Laufey said.
Thor hurried to the ice, raised his hammer to smash through it to get to the controls frozen within. Before he could, Loki stopped him.
"If you do that you will crush the controls," Loki said. "We can't stop it now. The Bifrost will build until it rips Midgard apart. Kuri's home..."
"Why have you done this?" Thor demanded.
"To fulfill the law of the gods," Laufey said. "Communication between Asgard and Midgard is forbidden. There must be consequences."
The two attacked Laufey in much the same way they had attacked the Destroyer. Thor struck him with lightning and Loki impaled him with ice, and then they both struck him with their weapons in a finishing blow. Laufey slumped, dead. But it did not save Midgard.
Bifrost Landing Site
Selvig, Rei, and Coulson looked up with concern at the hole in the sky, where excess Bifrost energy built up around it.
"Dad?" Rei said.
"Something's wrong." Selvig said.
Heimdall's Observatory
Loki looked about him desperately - at the Bifrost firing towards Midgard, gaining in strength, at the surge of energy moving through the Bridge. He's at a loss of what to do.
Loki realized what he must do - and what he must sacrifice. He looked at Kuri. "I'm so sorry."
"Thor!" Loki nodded, knowing his brother had the same thought.
Thor raised Mjolnir in the air. Clouds formed above him, thunder RUMBLING. Lightning arcs off of his hammer, as he channeled the power of the storm into it, then - He struck Mjolnir down upon the Rainbow Bridge. The blow was massive, causing a rumbling along the whole bridge, shaking the Observatory itself like an earthquake. A crack appeared where the blow struck. Kuri was horror struck and betrayed. They were going to maroon her here?
"Stop! What are you doing?!" Kuri shouted.
Thor lifted the hammer again, brought it down harder. BOOM!
The crack grew bigger. The Bifrost energy started to stream out from it. Kuri thought fast.
"If you destroy the Bridge, I can never go home again!" Kuri shouted
"Forgive me." Loki said. "It was my idea."
Summoning every bit of strength he has left, Thor raised Mjolnir one last time, drawing lightning to it from all sides, and brought it down with a final, terrible blow. The Bifrost shattered, rainbow energy exploding out of it.
Kuri, Loki and Thor were hurled into the air by the force of the blast. A wave of destruction moved forward along the Bridge towards the Observatory, breaking it apart as it went.
The Observatory ripped itself apart.
As Kuri, Loki and Thor fall together, Thor grabbed hold of one of Loki's hands, while Kuri still clutched the other. They all fell towards the massive wave of Bifrost energy which spewed out from the broken Bridge.
They were an instant from being blasted by the destructive force of the energy, carried away by the current, pulverized by the debris, when - a powerful hand caught Thor's leg.
Thor dangled there, holding onto Loki as Kuri clung onto his other hand. Loki looked up, shocked to see Odin Allfather Standing on the edge of the broken Bridge, awakened from the Odinsleep, restored to his full strength.
Kuri searched Loki's face, looking for some kind of reason why he had betrayed her, but all she saw was deep regret.
Kuri let go.
"No!" Loki shouted.
But it's too late. Odin, Thor and Loki could only watch as Kuri fell into the rushing torrent of Bifrost energy. It carried her away, along with the debris of the Bridge and the Observatory, disappearing out of sight.
Odin pulled Thor and Loki up onto the Bridge. Drained, Thor and Loki fell back into their father's arms.
"It is over." Odin said.
Bifrost Landing Site
The Bifrost energy exploded in the sky like fireworks firing in all directions. Selvig, Rei, and Coulson stood watching in amazement.
Rei looked back up at the sky, distraught. She knew the significance of what's just happened.
"She's gone." Rei said.