The two of them went across Hell until they found the mountain that Crimson described, and trillions upon trillions of hellspawn that seemed to have been waiting for them to arrive. Crimson stood on a ledge and aimed his bow towards the sky, just as one of his arrows sparked with an energy unseen by anything before. The hellspawn roared at his sight before Crimson shot the arrow into the sky. The moment he did however, he quickly flew as fast as he could to the Mountain to escape the radius of what was about to happen.
Crimson flew to a mountain almost thirty kilometres away from the battleground, quickly followed by Rainbow. Once Crimson and Rainbow were comfy, they could just see a small purple light that was falling to the ground in the Hellspawn army. The moment that it made contact however, the results were completely different. "Cover your eyes for a moment, otherwise they are going to melt." Crimson told her. There was a bright flash that was hotter then the sun before all of the energy suddenly went outwards. Once Crimson and Rainbow were able to open their eyes, they seen a mushroom cloud larger then anything they had ever seen. The magic energy arrow had essentially nuked the Hellspawn with a 1 gigaton blast.
Crimson flew towards the giant army, his Longbow transforming into a blade as he came down towards the army. Once he landed, the shockwave from him hitting the ground alone killed 15,000 demons alone
Dash decided that she would devastate the demons, as she slaughtered about 988,000 with her plasma sword.
Crimson utterly blew the demons away, obliterating over 3 million demons before allowing Rainbow to take the lead
Rainbow Dash immediately jumped in, killing the remaining 7,804,500 demons with almost no effort. "Told ya I could handle it," she said with a sly wink.
"Well....I never said you didn't." Crimson said, looking at the mountains of bodies around them. "Alright, let's finish this. Let's kill us some generals..."
Five generals came out of the mountain, Giants in their own right and extremely powerful. Crimson got himself psyched up to prepare as he got into a stance. "Screw that, we should take them all at once."
"Okay, then," she said, "Let's waste 'em!" She charged in, full speed as she leaped into the air and savagely slaughtered the general she landed on, annihilating his head with her sword.
Crimson cut a general clean in half with his blade, running up the Giants blade and decapitating him. Once he performed the attack, he used a fireball on his other hand and shot another general in the face
Rainbow Dash took care of the remaining generals as quickly and brutally as she could. "Right," she said, "That's all of them."
"Just to be sure, let's destroy Satans body" Crimson told Rainbow. "Let's make sure that he stays dead, permanently. You get to have the honour."
She stepped up to Satan's body, and cast a spell to obliterate his body completely. "Yippie-ki-yay, mother#$@%er!!" she said as his body disintegrated.
"Well....we just killed trillions upon trillions of demons, killed the Devils top generals and made sure that Satan is completely dead. Hell will never recover from something like this. Job well done." Crimson just said before opening a portal. "You were awesome today, Rainbow. Let's go home."
Rainbow and Crimson went through the portal back to Earth, where they can hopefully relax and spend the rest of their lives in peace. If only it was that simple....
(It's time-skip time again, everyone!) The next day at school, Circuit asked to talk to Rainbow Dash and Crimson in private.