Disclaimer: I do not own Batman, even though I wish I did... Plot line is mostly mine

Part I: The end of Slayer

"Oh, Birdy Boy" said Slayer.
"Nobody calls me that." Says robin aloud "except one" he thought.
He turned around and saw her standing there. A smug look on her face, knowing he was going to lose even though it would be on purpose. He couldn't help but smile at the familiar face the one he had come to know with all the days of training and all the fights they had, had and especially the days off that Bruce had to go to work and the sidekicks were left to train or to relax their now aching muscles. But he had to stop thinking about it now all he could do was say something to explain the look to Harley.
"So you're the new kid. Heard you ran into Knightwing".
"So you're boy blunder. Wow no wonder they call you that flabby."
Knowing she meant nothing by it and had remained in character comforted him. Even though to everyone else she was as bad as Harley, but smarter, that thought made him laugh.
"Not flabby as much as buff."
"Sure".
"Enough blabbering take him out!" yelled Harley from a corner.
"Shut it Harley unless you want me to leave you here. I could always do that just get the formula from bird boy here and be on my way. Mr. J wouldn't mind as long as you didn't upset him again."
"Alright then you want this formula come and get it."
"Oooooooo. I am sooooo scared." She said waving her arms.
She shot at me first making me be on alert and jump. Then she rolled around the corner and in my path. I threw the first punch. Dodging it she went down and kicked at my legs. I jumped back and made a run for it, to the wall and over her head as she followed me. Jumping back to make room I landed on top of her.
"You've gotten better." She whispered so quiet I could barely hear her.
"Ha you're going down" I responded like she hadn't said anything.
"You sure about that" She said rolling over and jumping off me, then shooting at me again.
I jumped back and rolled out of the way and again she rolled into my path again. It felt like a cycle.
"To predictable" She said.
"Shit!"
"Oooooooo. Bird Brains got a potty mouth maybe we should rinse it out with soap."
"Would you both just get on with it" said Harley again from the corner.
"I'm warning you Harley don't make me leave you here"
She truly sounded annoyed at Harley. I couldn't blame her. She had to spend days with the Joker and Harley; I only had minutes. She dodged the kick I aimed at her head and pushed me down landing on top of me. I could see the look in her eyes. It was time. I struggled weekly underneath her while she rolled me over and tide my hands. To my surprise she put a small knife in my hand to cut the rope.
"That wasn't part of the plan." I thought. "I was supposed to be captured and taken to Joker by her to show loyalty."
She got up and freed Harley.
"Alright now we get to kill the little birdy." Said Harley
She locked eyes with me and I could tell she knew this would happen and that's why the plan was falling apart. She had told that to knight wing that is was all falling apart. ; That we had to act faster.
I cut the rope just in time for her to aim at my heart. I jumped and she looked at me gaping.
"Don't just stand there go after him!" shouted Harley
She jumped up to the catwalk I was on right as I jumped out the window; she followed.
"I'm so sorry" she whispered, "I never wanted to hurt you." Right next to me crouching out of sight.
I threw a punch at her face, she looked surprised and then she realized what I was doing. I ran and jumped to the other rooftop. She stopped and stared as I heard Harley started yelling at her.

Slayer's POV:

I got a beep in my ear and I looked down at my wrist to see that dead shots tracker is on a rooftop to close for comfort. So, I radio robin on his earpiece and told him to head to the hide out and keep his head down; while Harley joined me.
"So where's bird brain?" she asked
"He ran off."
"Does he have the formula?"
"Ya, but that's not my problem." I said, Running to the other roof top and jumping down while she shouted obscenities at me.
I ran to the dinner but right before I got there, there was another beep in my ear.
"Joker here!" he yelled.
I stopped
"What's up funny man?" I asked using the nickname I came up with him.
"Well, just letting you know not to worry that Robin got the formula, the formula for COKE with a little COKE (the drug) in it. Hahaha." His laugh sounded strained and forced, I made a note to tell Batman that later.
"Well then do I have the rest of the night off?"
"Would you like to dance first?"
"What?!" I asked
"I'm at the policeman's ball would you like to join me?"
"Only if I get the first dance" I responded laughing.
"First, you have to pick up a few things. The new ninth precinct is using new technology and I would like to borrow it."
"ahh ok"
"Pick up the specs on it and meet me in the ballroom."
"I'll be there in an hour"
"Don't be late" he warned and signed off with a laugh.
I ran to the dinner just south of the ninth precinct where I hid a transporter for emergencies.
When I walk into the main room of the headquarters Robin looked at me. Fear in his eyes but disbelief on his face.
"What the Hell was that?" he yelled.
"I know, I know, it's bad, but I will have your back. I will always have your back." I told him.
He sighed then looked at me; I walked over to him and gave him a hug. He never really showed his feelings but the pressure of this night had him all screwed up.
I walked out of the dinner 5 minutes later and sprinted to the ninth precinct. I was about five feet from the precinct when I heard another beep in my ear.
"You there yet?" he asked snarkily
"Just got here" I responded
"Well good now inside they have a bunch of of specs and I want, but let's cause some chaos while we're at it."
"Like what?" I asked
"How about you release clay face and destroy the mainframe."
"Sounds like fun"
He signed off with another laugh, and it still sounded forced. I entered the precinct passing two guards that had fallen asleep but the next two spotted me. I grabbed one with my Taser wire, causing him to pass out, and shot the other. I ran down into the basement where six guards were standing around clay face.
"What do you think you're doing down here?" asked the man apparently in charge.
"Freeing the beast." I said as I pulled my pistols and shot them all, "Clay face if you wait a second I'll get you free but I have something to do first."
He roared as I ran into the main frame hub just down the hall. I accessed the mainframe and downloaded everything on it to a flash drive. As I walked out with the information I threw a sticky bomb at the console and blew it up. Running down the hall I could still hear Clay Face roaring. I accessed the terminal that controlled his cage and turned it off.
It was easier considering I had already exploded through the other firewalls, literally.
I was heading towards the Hotel and decided to stop by my Headquarters.
Knightwing greeted me as I walked in and Robin just stared at me.
"Here." I said
"What's this?" Knightwing asked
"The Ninth precincts hard drive."
"Ummmm."
"Don't ask."
I ran out of the room five minutes later wishing I could stay longer. Knightwing had told me if this worked out then I could live in Wayne manor and go back to being a real hero.
When I arrived at the Hotel a group of Joker goons were standing around waiting for me.
"Boss is waiting for ya" Said one of them.
I nodded my head and walked through the hotel. All the off duty cops were tied up and yelling at me that I would "Rue the day you set foot here!" I seriously think some of them were drunk.
I heard Batman yell from the other room, "You'll never get away with this."
"Oh, Contraire Batman I will as soon as I get my hands on my little present." Joker responded as I walked in, "Well looks like it's here!"
Batman looked at me and just glared.
"Look who decided to show up", said Harley clearly envious that he put an important task on my shoulders not hers.
"Ya, about 45 to an hour early."
"Shut up, you two!" yelled Joker, "Now give me my little present."
"Not so Fast Joker!" yelled Knightwing running in; as he stopped I could hear a groan from the other room, clearly the goons who escorted me in.
"Your still out numbered my winged friends." Said Joker seeing Knightwing, "Now Slayer if you ever want to live beyond tonight give me my present."
"Why? I could just leave you here to the two vigilantes and be gone. I would never see you again. Or I could take you little present and beat the shit out of you with it for all the times you decided I needed a new bruise or scar." I responded angrily.
"NO ONE THREATENS MY MR. J!" screamed Harley running towards me with her hammer. I jumped out of the way and pulled out my pistol, shaking my finger at her with my other hand. But she didn't listen instead she swung.
"HARLEY, STOP IT OR ELSE!" Yelled Joker
She stopped and just stared at him, noticing he was completely serious she returned to his side and just glared at me. "Now give me that flash drive."
I handed the empty flash drive to him; I had grabbed it and emptied it at the headquarters earlier.
"Hehehe! You two take care of our winged friends, while I get the surprise of a lifetime set up, hehehe!" yelled Joker with delight.
"I call Batsy!" I yelled
"Fine I'll take the bird" said Harley.
Batman started for Joker but I couldn't let him, not yet at least. I jumped in his way and kicked at his head, dodging he grabbed my leg and pushed it down allowing me an opening at his face. Swinging my fist, I hit his nose but not hard enough for him to feel it, we kept at this for another minute or two. Finally I kicked at his face again, but this time instead of shoving it down he caught it.
"Now" he whispered in my ear as he threw me to the Joker.
In the air I contorted my body just in time so that I hit the Joker in his side with my feet.
"Watch IT!" He screamed at me, "WHAT THE HELL IS WRONG WITH YOU?"
"Say good night." I responded, kicking at his knee and crippling him as he got up. He looked pained, but fought back. He was no match for me, I knew all his fighting techniques all his dirty secrets. As Batman Joined us I backed off.
"I'll help Knightwing" I whispered leaving Batman. Heading towards Knightwing Harley saw me.
"YOU!" she yelled knocking over Knightwing with her hammer.
"Me?" I responded, "What did I do?"
Smirking I jumped over her head and behind her. Lowering myself to the ground I kicked her feet from underneath her. Falling, I shot her in the leg knocking her out for at least an hour.
After finishing off Harley I looked over to notice Batman and Joker had made it to the roof. I followed and got up to the roof just in time to see them slip off. Sprinting, I caught Batman's hand just as he slipped off the edge. Feeling a jolt of electricity I noticed Joker was using a Taser on Batman. When Batman was finally up he grabbed Jokers other hand but he slipped. All the weight was put back on me and I was not ready.
Joker pulled me down and we fell down for what felt like ages but was only seconds. I landed on my back completely unprepared. A sharp pain came from my side and crawled up to the base of my neck. My vision faded as I saw Batman swooped down to where I was laying.