Superman was flying right beside the bat jet, fully in thought when the comm in his ear beeps.

"She left you a voice message, you know." Batman says sitting comfortably in the cockpit of the jet.

Superman smiles a little with his fists stretched out in front of him, per usual.

"Did you listen to it?"

"Of course, she could've been contacting another villain."

Superman rolls his eyes. "She's not a villain! Why do you always have to be so suspicious!"

Batman turns his head slowly and Clark didn't have to use x ray vision to see Batman's eye roll.

"You know what! Nevermind, play the message."

The light banter between him and Batman brings little smile to his face before he straightens up and listens to the voice message.

(Voice message Y/n recorded in Part 3)

Clark smiles hearing the nickname 'Glasses' then hears a little chuckle from batman.

He looks back to see batman totally straight-faced and not having moved since the last time he looked.

"I have super hearing remember?"

Batman presses his lips together, a little embarrassed getting caught laughing, before quickly starting the jets decent.

"We're here."

Superman snorts before following behind, and the jet finally landing on a small decserted island.

Once their both firmly on the ground, Batman confidently walks into the jungle.

"Who exactly is our lead? We're really far off from Gotham right now, there's no way any bad guys are around here."

Batman shakes his head, pushing a few leaves out of the way.

"I wouldn't call them bad guys, more like, reformed, thanks to my help-"

Making a quick side step, Batman avoids a vine charging right at him that superman effortlessly catches with his hand. Only after he grabbed it a red and black hammer is swung against the back of his head and breaks into hundreds of little woodchips.

"Hey! That was my favorite hammer!" a girl walks out from the bushes. Harley Quinn! Dressed in casual clothes but hair still tied into two ponytails.

"You should've warned me you'd be coming Batman!" Ivy, also wearing casual clothes stepped out of the bushes and yanks the vine out of Superman's hands.

"I sent a communication through hours ago, you should've gotten it by now."

Ivy's eyes slowly slide over to Harley, who giggles innocently.

"Red! Baby, did I mention Bat's is gonna swing by?"

~~

Y/n was slumped down on the floor right where Batman and Superman left her. Her fist was clutched shut tightly with blood leaking from between her fingers.

"Why is my hand bleeding? Why can my blood burn things?!"

Her heart beats quickly but she quickly takes deep breaths in through her nose then out.

"Ok, ok! Calm down, it's probably fine! Just bandage it up!"

She shakily pushes herself back up to stand. She slipped suddenly and almost sent herself flying over the railing and into the cave rocks below.

She growls and hits her head with her free hand.

"C'mon Y/n! Pull yourself together!"

She quickly runs to the medical cabinet, grabbing a hand full of bandaid and wrapping her bloodied hand quickly.

Once it was neatly and tightly wrapped up, Y/n felt herself breath again, until the bandages drop from her hand as the blood melted through the cotton material.

Y/n growls and squeezes her first shut again. She looked around for anything she was able to use to keep her blood frop dripping holes into the ground.

"Computer! Is there any way you could contact Batman right now?!"

The computer beeps once before it's voice echoes though the Bat-cave.

"I'm currently unable to reach him due to comm's being out of range. I will alert him as soon as he's back in range. Is there anything I can help with?"

Y/n scrunches her nose before stomping her foot on the ground in frustration.

"UGH! Shit!"

She looks back down at her hand before getting a small idea.

"I-I need something indestructible! The Bat's gotta have something like that here!"

The computer takes a moment before it makes a accepted sound.

From one of cases where Batman's suits are displayed, a door opens to a suit that looks close to all the others with the exception of bits of a golden metal embedded in it.

"This suit is made of Nth Metal. A metal that is used by Hawkman and others of his kind, nearly indestructible."

Y/n bites her lip and takes hold of the chest plate before yanking it off the mannequin.

"Sorry Batman!"

Feeling a bit of relief she looks around before spotting a notebook and pen.

After a few moments she's comfortably sat against a wall on the ground with her hand resting in the chest plate letting her blood drip from her palm into the chest plate like a bowl.

The notebook was resting on her leg as she scribbled down notes. Perfectly content and distracting herself with small doodles and notes.

"I really hope Batman and superman get here fast!"

She mumbles before leaning back and looking up at the roof.

"Clark, I really need you right now."

~~

Back in the jungle, Batman and superman were sat up in Harley and Ivy's small tree house.

The house walls made from vines and wooden floors, of course mixed in with some solar panels for electricity for Harley.

"This girl, she's got my Toxin in her blood? And she hasn't died? That's not possible, her organs should've melted from its acids by now."

Batman spots a visible flinch from Superman before quickly adding,

"Well, they haven't, we believe that the Joker venom and Scarecrow toxin have something to do with that. Was there anyone on the island recently?"

Harley was sitting next to Ivy playing with her hair when she chimed in.

"Well, There might've been some nasty looken guys on the island a few nights ago."

Harley pouts and looks up at Batman.

"They grabbed some of the Hogweed on the far side of the island, one of the plants carrying Ivy's toxin."

Superman growls before yelling,

"And you let them?!"

"Of course not!" Ivy yells back.

"We killed alot of them, but one guy got away! With a very small amount of the toxin."

Batman lifts his forearm and types onto the small screen in his cuff.

"This means they didn't have enough to make more than 1 green vile. Their intended target was one person from the start."

Superman clenches his fists with a few small knuckle clicks.

"That night I went to the storage, there weren't any other viles, only the one I took straight to you. It was a trap intended to poison Batman."

Batman looks down thinking for a second before swiftly standing up.

"We need to get back to the Reporter, make sure there aren't any other Toxin's we missed!"

Superman agrees and they both walk to the exit together before hearing Harley's voice, stopping them for a second.

"If I know anything 'bout Mister J, it's that he never makes mistakes. And if he does, it's always included in the plan somehow."

Batman only nods back at her before using the grappling hook to swing down from the tree.

It was a few minutes away from the island when batman gets a notification in the bat jet.

"What is it?" Superman asks having heard the alert.

"It's the girl, she asked the computer to call for us about 2 hours ago."

Superman feels his heart skip a beat and without another word a sonic boom follows his speeding up.

Batman puts the jet into super-speed and follows quickly behind Superman.

Landing aggressively onto the floor of the bat cave he scans for any sight of Y/n. When he spots her sitting on the ground, the chest plate was almost overflowing with blood and Y/n was out cold. The note book she'd been writing in had fallen onto the floor beside her.

He speeds over to her and lifts her hand out of the pool of blood that had burned her sleeve and only slightly burned her skin.

"She's lost alot of blood!" Superman yells to batman when he puts her back down on the med bay bed.

Batman makes quick work of her hand when he uses a thicker bandage used for Super's to wrap her hand.

"Stupid girl! Get her linked to the monitors!" Even for Batman, he had a slight bit of worry entangled in the anger in his voice.

Superman takes a stick on heart rate monitor and placing it on her chest right beneath her collar bone.

"She needs blood, but no human blood is gonna save her now!" Batman declared.

Superman realized what Batman was suggesting and shakes his head quickly stepping back.

"No! We have no idea what my blood will do to her! We don't even know if my blood is Human compatible!"

"CLARK!" Batman yells aggressively grabbing Superman by the shoulders.

"She may not have a choice! Save her, Clark. I know what she means to you."

Superman clenches his teeth giving Y/n a small glance over batman's shoulder.

"Alright, but I don't know how she's gonna handle Superman giving her blood."

"Then don't be Superman."

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Hope yall enjoyed part 4! Lemmi know if i missed any gammer or spelling errors!

Happy readings! ^^