When morning came, Frost was already up and checking his equipment before Fluttershy came into the room awoken from the noise he made. She turned on the light and was so intimidated because this was the first time she's seen him all healed up and ready for action, even the animals looked tense and she tried to calm them down.
"Good morning, what are you doing up so early?" she asked.
"I'm gonna settle some scores." Frost said holstering his rifle.
"You're not going to hurt anypony, right?"
"I'm just going to have a talk with some old buddy of mine."
"Oh, thank goodness, for a moment I thought that you really were like the girls say about you."
"It won't take long, I'll be back. No funny business."
With that Frost opened the door and headed into the forest to find Amar while Fluttershy looked dumbfounded at him leave, after all she did to keep him safe he still didn't trust her. After all, she was a little relieved that he will leave that day and she would stop lying to her friends and everything will return to normal. She would like to invite her friends for a tea party after Frost leaves and gets to talk openly about everything that happened to her in the past two days. After all, when her uninvited guest is gone nopony could hurt her and her friends now. She could barely hold her excitement, after a little while after Frost left she went into town to invite her friends over for the evening.
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After walking for thirty minutes, Frost finally reached Amar's shelter, though it appeared that the Tal'darim was in some kind of self induced stasis. The Ghost stood right in front of the tall walker and tried to figure out a way to awaken the Protoss. Eventually, he managed to disable the stasis using an EMP round and Amar awakened startled.
"What have you done?" he asked.
"Rise and shine sleepy head, we have work to do." Frost said while walking to the battlefield and was followed by Amar.
"I suspect that Amon is playing a great part in this."
"You guessed it, he contacted me last night and he's sending his lackey to finish us."
"I believe that while we are here, our brethren and the Zerg are pushing Amon back and that he's trying to escape. Perhaps he plans to use this servant as a vessel for him."
"Even if you're right, I won't let him win this easily. He is from the Void, he is weaker here."
"We should never underestimate Amon's underlings. Even with their powers limited, they can still prove to be an extraordinary warrior. Even if I die by his hand I would be regarded as a loyal patriot."
"You need to get a hobby." Frost finished.
When the two reached the site where the battle took place. The ponies started clearing the dead and were moving quite quickly due to Twilight Sparkle's leadership along with her friends. Seeing that they couldn't get out in the open, Frost and Amar decided to hide in some bushes and observe the ponies in front of them. Frost used his visor to detect high value targets in case they get detected, he spotted Fluttershy's friends doing whatever they could to help and he even saw the four princesses sitting at a table and organizing the process. He heard something behind him and turned only to see Fluttershy there with an excited smile on her face, she didn't notice them. When she was close enough, Frost snatched her and held her muzzle shut with his hand.
"What are you doing here?" he asked.
"Oh, well, today being the day of your departure I just wanted to invite the girls over in the evening." Fluttershy answered.
"Please tell me you haven't talked with them yet."
"Actually, I was just returning home to prepare..." she said trembling before shutting herself up.
"You're lucky that they would actually look for you if you disappeared. Now go and call that thing off before you blow my cover." Frost said.
"This creatures really are free of doubt, comfort breeds weakness." Amar added.
While Fluttershy was still trying to find her friends the sky opened again and a single meteor fell right on top of the field. All the ponies got to safety before the impact which resulted in an explosion. After the dust settled, it revealed a lone figure standing on two legs, Frost and Amar emerged from the forest to face their foe while the ponies were watching from a safe distance. When Frost got closer and could clearly see his enemy his thoughts turned into rage and hatred towards Amon. Before him stood his brother Will in his Spectre gear.
"I don't believe it!" Frost exclaimed.
"Does this enemy seem familiar to you?" Amar asked, but before he could get his answer the voice of Amon echoed from Will.
"You are the only things standing against me on this soft world. Once you are dealt with I shall have a realm in which to be reborn." Amon said.
"Do not underestimate me, Amon." warned Frost.
"Ah, yes, your brother's death launched you in this crusade against me. Now we'll see how determined you are now that I took control over his body. Would you kill your own blood twice? That makes you a murderer." Amon retorted.
"I live to kill." Frost said simply.
"You dare the wrath of a Xel'naga? You will not see the end of this day." Amon yelled before launching a psionic sphere out of his hand.
Frost managed to dodge the attack and rolled behind a pile of bodies while Amar stood and fought Amon with conviction, taking every attack thanks to his shields.
"The hour is upon us! Fighting you will grant me the honour that I lost." Amar yelled with a little joy in his eyes.
Frost was shooting at his possessed brother to no avail due to a Void Shield granted by Amon, but he saw that his attacks become weaker every time he is hit. Frost realized that the shield is draining Amon's strength and he continued to fire from behind the mound of corpses. Amon saw this and blasted Frost's cover leaving nothing to hide behind and the Ghost was now in open ground so he activated his cloak and tried to dodge Amon's attacks while Amar was trying to draw the god's attention. Eventually he succeeded, but not without angering Amon.
"Enough, do you think you can destroy your god?" Amon said while lifting Amar in the air and launched him into the ground almost destroying his walker. "All shall submit!"
Frost emerged from his cloak and unloaded his rounds into Amon's shield almost draining it. When he ran out bullets he pulled out his pistol and continued to fire, but to no avail, his brother turned to him and grabbed him by the throat before slowly lifting him.
"Such arrogance to think that you of all races can strike down a Xel'naga." Amon said before he lit a psi blade from his left hand."I will show you that you are nothing compared to me."
The battle attracted a large crowd around it, all the ponies that were working on clearing the bodies were now observing the brawl and were so shocked that even the Princesses didn't interfere. Fluttershy stood there in complete horror and saw firsthand that her kidnapper was about to be impaled, she was so afraid, but almost without thought she started galloping towards the two fighters. No one even saw the yellow pegasus until she smashed into Frost, freeing him from Amon who turned his attention to the little pony that was now paralyzed in fear in front of him.
"You foolish little creature! You will pay for this!" yelled Amon before the sky opened up again and appeared a Terran Medivac that was barely flying. "There is no escape for you, Terran." he said before firing a psionic sphere and hitting the Spaceship making it crash into Cloudsdale which arrived near Ponyville to assist on providing rain for the battlefield to grow plants again.
While Amon was distracted, Fluttershy was swooped up by Rainbow Dash and flew back to her friends. Frost landed near Amar and tried to get back up before the Tal'darim called to him.
"Terran, my systems are failing, I can fight no longer. But I can give you something that will help defeat Amon." he said as if he was dying.
"What is it?" Frost asked.
"It's the terrazine that fuels my walker, it will give you the power to vanquish Amon from this world." Amar said.
"You do know that the terrazine keeps you alive, don't you?" asked Frost rhetorically.
"I know too well, this is my time." Amar said before unleashing the terrazine from his walker and infusing the Ghost with it. "I am but memory..." the last words escaped the Protoss before his body vanished into thin air leaving the walker an empty shell on the ground.
"You should never underestimate your enemy, Amon. Vengeance is near." Frost announced drunk on terrazine.
"If you think that some of the Breath of Creation is enough to defeat its master, you are mistaken." replied Amon.
After that, Frost charged his possessed brother with bloodlust in his eyes. They both clashed, none wanting to give ground and Amon was even surprised at Frost's power for a moment. In a second, Frost pulled his knife and stabbed his foe in the side for three times to destroy the shield that was protecting Amon and stabbed and one more time before twisting it opening the wound. Amon managed to push back Frost, but was stopped dead in his tracks when he saw Frost pointing his pistol at him.
"You were fortunate that this body has a limited supply of Void energies. You are only a spec of dust compared to my true power." Amon boasted.
"It may be so, but I have defeated you here. You will have nowhere to run once the rest come to get you in the Void." Frost responded feeling a little bit familiar to the day he had to kill his brother.
"I cannot be defeated! I am the one true god!" Amon roared before being shot by Frost with his last bullet. "How does it feel, to kill your blood for a second time? Murderer." he said while being consumed by the remaining Void energies in his body and caused him to explode leaving nothing behind but dust.
Frost managed to get away from the blast, but now he had to deal with a whole crowd of ponies that were looking for him the other day. He managed to slip by while they were dazed by the explosion. The effects of the terrazine wore off leaving him weak and barely standing. He had to get back to Fluttershy's cottage before someone spotted him.