After the breakout at Belle Reve, Mourning Star had been asked to join the Injustice League and she accepted. She prepared Icicle Junior's room for him complete with ice sculptures and furniture made entirely out of ice. She was in for some trouble when he got out or escaped. Whichever came first, she would never hear the end of leaving him there. It was afterward that she learned Tuppance and Tommy Terror were never in Belle Reve, that it was just Superboy and Miss Martian pretending to be them. At this current moment in time, the Injustice League (or the younger members for the most part) were fighing the younger members of the Justice League.
While the rest were busy with the male team members, Mourning Star managed to single out Miss Martian and begin their fight "Nice job breakin' into Belle Reve! You even had ME fooled!"
"Its not like it was very hard to fool you, Mourning Star!" she zoomed around in circles as she felt the heat from the other girl's fire. I better be careful! If her fire hits me, I'm done for!
Mourning Star grunted with rage and shouted "At least I don't have to PRETEND to be someone I'm not on a daily basis while I'm at school!" M'Gann's face dropped, the green color becoming a pale green. Smirking, Mourning Star knew that she hit a nerve and continued to hit that weak point "Just think: what would your precious cheerleading friends say if they found out you were a Martian?"
"Stop it..." M'Gann said, gritting her teeth "Stop it right now..."
Poking that same spot, she shouted in her mind they'd think you were a freak! Kick you off the squad and proclaim that you used your powers to get on the team!
I said stop it!
And they'd find out that your so called 'boyfriend' is the bastard son of Superman and Lex Luther! To be honest, I see more of Luther in him than Superman! I guess that's why Superman won't give him a second glance!
Mourning Star was a genius, she was jamming Miss Martians telepathic waves by filling them with her truths. Nobody else was able to contact her this way, and she used it to her advantage. She showed sympathy and said "It doesn't have to be all that bad, girl..." she embraced the Martian in a tight warm hug. "All I really ever wanted was somebody to show me the Light..."
Miss Martian was overcome with joy and hugged back tightly "Do you really mean it?" she smiled warmly at the fire powered girl.
"Not in your dreams, kid" said Mourning Star and she lit herself and Miss Martian on fire. The green girl didn't even have time to go intangible when she let out a scream that bought everybody back to reality.
Superboy was about to issue a super beat down to Bizarro when he heard her scream "M'GANN!" he abandoned what he was doing and rushed to her aid, catching the falling Martian girl as the skin began to peel off. "Oh God...M'Gann! M'Gann!" he gently shook her, but she wouldn't wake up.
Aqua Lad did a quick scan of her condition and said "She is in bad shape! If we do not get her back to the Mountain now, she shall surely die!"
Kid Flash zipped by and said "Dude..."
Conner's eyes began to tear up, but he blinked them away and said "Take her and get her help...I'll deal with Mourning Star!" he leaped up, roaring like a lion, but she was ready for him. She set all the surroundings on fire and kept up with her mind games.
"You know your little girlfriend's gonna die right? All because 'she lives in a stupid world where all her problems are solved in half an hour'" she was now clearly mocking him, hearing the tape recordings from Dr. Strange's sessions with the "Terror Twins".
He locked hands with the woman, normally easily overpowering her, but his emotions were clouding his judgment "I will kill you for what you did!"
"What I did? Is it MY fault that she's too trusting of others?" she focused the majority of her heat to her feet and glided around him "You think it's MY fault she didn't go intangible when she had the chance?"
"It's your fault for burning her!" he pushed her back into a burning building.
"The thing about me and fire..." she smirked at him and then engulfed herself with the flames "go together like peanut butter and jelly" drawing more power from the fire she set him ablaze. He let out a yell of frustration rather than pain, and by the time it was over his clothes were singed.
"Just you wait until-" he grunted, but was cut off by the com link in his ear.
"Aqua Lad to Superboy! M'Gann's in critical condition! Abort mission and get back here now!"
Torn between going to his girlfriend and beating her assailant to a bloody pulp, Mourning Star said "So you'd rather fight me than go see about your dying lover? What kind of a boyfriend are you?" she could see his fists clenching in anger and she prodded it even more "I can just see Lex Luther's genes in you...back in Belle Reve when you manipulated Icicle Junior with such ease only proves that you've got more evil in you than good. But hey, I'll put in a good word for you with the Injustice League when-" at this point, Superboy popped her in the jaw with one of his strongest punches. It sent her flying through the wall.
Upon returning to the Mountain, everybody was in somber spirits "Where's M'Gann?" he asked, but they all just looked down in sadness. He then grabbed Wally by the shirt and repeated "WHERE'S M'GANN?!"
Aqua Lad tenderly touched his shoulder and said "I am sorry, Superboy...M'Gann's gone..."
Upon her return to the Injustice League headquarters in the city, she was met by a satisfied Lex Luther "Well done, Mourning Star. You've managed to take out a key member of the Young Justice League. Such a thing should be rewarded, don't you think?"
"Indeed. The only thing I would like for you to do for me is that you bail Icicle Junior out of jail, if that's not too much to ask" she set her things down and moved her jaw about "Your clone has dislocated my jaw..."
"Of course he did" Luther smiled at her "And I take it you've delivered my message to him as well?"
"Would I ever let you down with something so simple?" she chuckled.
"Of course not, my dear" he wrote out a check for the set amount of bail money and handed it to her "I imagine you two have much to discuss" he then phoned for his limosine to go and retrieve Cameron.
Officer Wilcox banged on the cell door of the real Tommy Terror and Icicle Junior and said "Hey Junior! You made bail! Get your things and get out!"
"Really? Who paid my bail?" he said, hopping off the top bunk and putting the prison orange on the floor.
"Lex Luther, now hurry up! You don't wanna keep your sister waiting, do ya?"
"Sister?" he asked himself, getting his regular clothes on and out to the limo. Once he saw who it was he went dead silent and listened.
"Brother dear!" she mocked him "Why so blue?"
"Considering that you played me for a fool, used me, toyed with my emotions and used my own hormones against me, I'd say I'm just peachy" he put his face in his fist and huffed against the seat.
"Don't be so cold" she scooted closer to him "I asked Lex to get you out, didn't I?"
"You work for Lex Luther now?" his ears perked up and looked her over "Have you gone soft on me?"
"Let's take a closer look at that, shall we?" she flipped on the mini-tv in the limo and the news came on.
"Earlier this morning, a battle ensued with the Young Justice League and the Injustice League where a great tragedy happened: It seems that the super villainess Mourning Star has killed Miss Martian, niece to the Martian Manhunter during the battle. Memorial vigils and services will be going on throughout the country indefinitely..." at this point she shut the TV off.
"You killed Miss Martian?!" Cameron shrieked, looking at her like she had three heads.
"Yep! Lex offered me a reward for my good work and I asked for him to bail you out for me. I set up your cold box already~"
"Dont be getting all flirty with me! I'm still mad at you for leaving me behind!" he shrugged her off.
"But I came back for you, didn't I?" she nuzzled his nose and said "That counts for somethin' right?" she kissed him lightly, the ice on his lips melting.
The limo made it back to the base, where a first significant kill surprise party was being held in her honor. Cameron joined the festivities, and later took a big whiff of himself "Ewww...I smell like garbage..." he went to the shower room where Mourning Star was wrapped in a towel. "S-sorry..."
"Don't be, kiddo...besides, you turned eighteen when you were locked up, right?" allowing the towel to drop, she exposed her body to him, and he just stared at her in all of her nakedness.
Gulping, he said "Y-yeah..."
"That means you're legal now...and I have a belated birthday present to give you..." she ran her fingers through his hair and kissed him passionately.
He pushed her away and asked "Don't water kill you?"
"Eventually, yes" she nibbled on his earlobe and continued "But taking a shower won't kill me" she stepped into the shower stall and steam began to billow from her body. "Will my steam hurt you?"
"Not unless I'm in total ice form baby~" he joined her in the stall "This aint Belle Reve, we got all night~"