So I replied on a comment asking how I wanted it to end so. I went and copied it for all to see

I was planning on having Marble create a task force ( codenamed Raven) in taking down different mobs. Slowly he would realize that something bigger is coming than just the mob.( the changling invasion) he would eventually find a storage room full of old equipment from his war I.e guns, helicopters, radios, and uniforms during a training exercise. Gathering more and more evidence of the invasion, he warns shinning armor; causing him to put the shield up. Fearing that he bubble isn't enough, Marble orders his team to remain on guard. When the bubble breaks, his team races to the landing area where they keep the couple of helicopters. In a counter attack called Operation Wedding Crasher, they storm the wedding hall in an attempt to rescue the princess and the rest, loading them into the chinook. Twilight questions about the two M60s in the windows. Which Marble remarks. "It's capable of delivering peace and friendship at 650 rounds per minute " Eventually the chinook is swarming with changlings. Fearing they won't make it to the elements, Marble and two other members of the task force parachute out of the back to draw the attention away. Not before giving Celestia a radio.The three of them know it's a suicide move, but are willing to lay down their lives for Equestria. After about an hour of heavy fighting, the three push towards the wedding hall in an effort to stop Chrystalis. One of the members is blasted away, while the other is picked up by a changling night into the air and dropped. Alone, Marble digs in. He's only 100 yards from the hall. A swarm pushes from three sides as Marble backs against a wall. Surrounded and nowhere to go, !arble does something dramatic. He orderes a rocket strike on his position.( a broken arrow) As the one of the other helicopters gets into position, he radios the Princess, saying

"It's been an honor to fight for you and Equestria again. I'm sorry"

Before his radio cuts to silence. A wall of fire erupts in and around the wedding hall. Unknown to Marble, as he ordered the rocket strike, the mind control on shining armor was wearing off. Just before the rockets came in, Cadence and shining armor's love blasted the changlings out of Canterlot.

Author's Note

Now it's dead