Lorcan  and Griffith Al-Ghul Wayne are the twin children of damirae from another universe but much darker. Damian was the head of League of Assassin taking the title of Rage Al Ghul while Raven is a hero but been abandoned by the Justice League after their failed mission to raid Damian's palace.
   As the result of her heritage with Trigon,  Raven remain as outcast in the hero's league until on day on that mission,  to prove Raven's true loyalty towards being hero,  they let Raven lead the mission to raid Nambat Prabat.
The mission failed stupendously  leading the whole team of hero to flee.  Raven who is depleted in her energy and magic plead them to take her with them but they receive an order from top brass to abandon her.
She was broken hearted and frustrated.
After she defeat her father,  receiving Atlas Pillar curse,  she wanted to be good and serve the people with good intention, and yet most of the hero doubt about her.
  Damian Al Ghul claimed her as a prize for his victorious defense. At the beginning,  he wants her head as a trophy but as he look at Raven and finding something exotic about her,  he decided to make her as his consort which is against her will.
Raven,  in low esteem, spending her days waiting for her strength to return still do hoping for justice league to rescue. Its been years, yet she still stay in Prabat.
Damian seems has taking care of her meals and clothes although sometimes they fought each other like almost they kill each other. At some point where both of them badly injured, Raven heal herself and this is when she knew her powers has restored.
She wanted to flee but as she remembered her in debt with Damian, she healed him,  and decided to stay.
Damian took the opportunity to pursue her as he developed feeling but in complicated way. Raven reject his advance at first but Damian still determine to gain her charm.
Sooner or later,  Raven hitted with her demon side heat and they end up having intimate each other which makes her relief and in the same time regret.  Thus,  she's pregnant with the twin.
As she birthed the children of Al-Ghul, Damian trained them like the way his mother train him and it seems that the twin has inherited their mother's power. Raven made Damian promise not to exploited their kids power because its dangerous.

Something happening in League of Assassin after a few years Raven give birth to the evvil twin. The follower try to gain control as they go power hunger.
Damian goes the hard way,  by make the rule more strict and the League broke into a couple of rebellious group. Damian tries to unite them and Raven saw this opportunity to flee with her twin.
Damian caught up with them and fought, its heavier that last time which is witness by their kids who is been held back by raven's black shield. Both of them heavily injured and again Raven felt pity with her stubborn lover.
As soon as she about to heal,  a group of assassin shot deadly venom dart towards her cause her poisoned, collapse in the arm of the League of Assassins leader. Lorcan and Griffith cried as they try to heal their mother but it seems their power hasn't reached to that level.
Damian were furious and quickly eliminate them not quick but agony death. The leader Al Ghul then held dying Raven in his arm,  whispering his confession, his love for Raven. Raven said she knew then died along as the shield that halt their kids disappear.
   The twin run towards their parents. Damian now in his final breath says to his heir.. "Be what your mother wants to be. " and he died beside his lover.  The dimension start to crumbled as Raven who carried the curse of Atlas Pillar died.
  The twin were helpless,  until Griffith felt a connection made from the other universe.  A connection from a young boy. He quickly connect it and open up a portal then a hand came up "Grab my hand!! " he ordered.
Quickly they climb up through the portal and quickly the portal sealed by a woman who has the same power with theirs. "Ingo,  what are you doing? " Raven concerned as she sealed the portal that lead to crumbled dimension.
"I...I couldn't stand it,  mommy.  I have to save them." the young boy stood while his eyes on the floor. Raven then look at the twin,  for they are quite similar too Casimir and Ingo only younger.
"Don't worry. You're safe. " Raven smile as she read the petrified aura from both of them. She absorb and they become unconcious due to the shock they received on that fateful day.
*A/n: these are the summary about the dark au where the twin come from. Please do ask me if you need to know something about them.  And their costume will be upload in the next chapter.  😊