Alex Mercer in Equestira(Pony Form)

Alex POV

I get off the ferry form Ponyville and I look around, "Exact copy of Manhattan, really?" I sigh as I go to a back alley and run up the metropolitan building, I stop when i flip over the edge and land on a rooftop garden. I spot a building with a radio tower so I smile as I press energy into my legs and I launch myself at it. I use tiny tendrils of biomass to keep me form falling off as I climb to the top and balance on one hoof. I look down on the streets and images of the infection pass through my head then the world settles on the infected version. "No no no this can not be real!" I'm knocked of the radio tower by a pony hunter I force my arm into a blade and stabbed it multiple times before cutting off its head. The world shifts again and I see that I completely obliterated a blue unicorn, "Cant let a meal go to waste." I lash out two feeding tendrils and completely cleans the body off the streets then my legs give out as the things memory goes through my mind. Hivemind. Chrysalis. Copy and feed. Hive locations. Kill the useless.I switch to a changeling disguise and starts killing the citizen, "For the queen!" I stab a pony with my bony horn going straight through a mare then I nod my head and launch off the ground and starts to fly toward the center of the hivemind.

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Celestia POV

A royal guard runs up to my throne and bows while heavily panting, "Princess a changeling attacked ponies in Manehatten and form testaments form the surviving pony before it started killing it screamed and I quote "For the Queen!" Also in the same area a dark hooded pony that morphs his front hoofs to claws has been sighted killing changing then the closest the reports say that he EATS them. Its unknown if he is targeting changelings or how he is. What should we do Princess?"

"If changelings are attacking we need all the help we can get and that includes who I believe is the same stallion that defeated and almost killed Luna...Keep tabs on him and he might lead us to Chrysalis and then I will defeat her once and for all. You are dismissed!"

The guard bows and runs off as I bow my head, "What are you and what are you doing? One monument you run off after trying to kill my sister then the net you are helping us get rid of monsters we would rather forget...What are you Alex Mercer?"

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Alex POV

I smile as I crush a changelings head to the ground and I look around for any more. I've noticed the guards following me a long time ago then I shoot at my whip fist at the head one easily grabbing him, "Do you want to know where the changeling hive is?" He nods and I let him go. "Then follow me." I jump as high as I can and starts to glide in the direction of the center of the hivemind.

30 minutes later.

I arrive a place that reminds me of a infected hive expect more holes inside of it. I put on my changeling disguise and walk to the middle of the hive that is buzzing with action I start to charge up my biomass into my clothes and after 5 seconds I explode with tendrils nailing each a changeling in the heart and they drop like flies as I morph my arm into a blade and claw, "Who dares kill my dear children!"

I cut another changeling in half and consumes it before it hits the ground, "Answer your question?"

The Queen screams and fires a energy bolt straight into my chest knocking me off my feet. "Nopony can survive that!"

I get back up and pops my neck as I run up to her slicing off one her wings, "My name is Alex Mercer and I have one reason to live." I put the blade through her gut. "To kill monsters like me, to be the last one standing." 16 feeder tendrils burst form my back and brakes down the Queen till she is a pile of goo and I consume her. Loneliness. Hatred. Love. Canterlot. Power. The memories end with a flash as Princess Celestia is standing over me so I get back up and stare her in the eyes. "What you want?"

"I came to talk to the Queen Chrysalis but by the looks of it you did it for me, you killed everything in here, why?"

"Only a monster can kill a monster so I did this world a favor by getting rid of one. Then I am going to Ponyville to ask Twilight for help with something."

"What do you need my prized pupal for?"

"To help discover the reason why my world is changing."