Darkseid had been defeated, and the universe was safe once more. But for Supergirl, a new challenge had emerged. The Anti-Life Equation was still out there, and she found herself drawn to it.

She had fought to stop Darkseid from finding it, but now, she felt an inexplicable desire to discover it herself. This desire consumed her every waking moment.

As days turned into weeks, she found herself growing more distant, her eyes burning with a determination that scared those around her.

The more she delved into the equation, the more her personality changed. She began to exhibit an arrogance and ruthlessness reminiscent of Darkseid himself.

The Justice League noticed the change in her. They tried to intervene, but Supergirl shrugged them off, obsessed with her pursuit.

The transformation was not just mental; it was physical too. Her once radiant blue eyes now shone with a sinister red glow, and her skin hardened, taking on a rocky texture.

As she continued her search for the equation, she became more isolated, refusing help from anyone, just like Darkseid would have.

Eventually, she discovered the equation. But the moment she did, she was overcome by a wave of darkness, a force so strong it threatened to consume her.

She had become a female version of Darkseid, complete with his powers and his thirst for control. She had become the very thing she had fought against.

The Justice League confronted her, pleading with her to fight the darkness within. But it was too late; Supergirl was gone, replaced by a new Darkseid.

As she stood against her former allies, a part of her screamed in protest, but it was drowned out by the darkness. She had become the enemy.

The battle was fierce, but the Justice League was no match for her. One by one, they fell, defeated by the very friend they were trying to save.

But as she stood victorious, she felt a pang of loneliness. She had everything she wanted, yet she felt empty.

She realized that in her quest for the equation, she had lost herself. She had become a monster, a tyrant, everything she had fought against.

The realization hit her like a punch. She had let her desire consume her, and in the process, she had become the very thing she despised.

Filled with regret, she made a decision. She wouldn't let the darkness control her. She would fight it, fight for the person she used to be.

It was a hard battle, one that seemed impossible to win. But Supergirl had always been a fighter, and she wasn't about to give up.

She fought against the darkness, against the equation, against herself. It was the hardest battle she had ever fought, but she didn't back down.

It was a long and grueling battle, but eventually, she won. The darkness receded, and Supergirl was back, stronger and wiser than before.

She returned to the Justice League, apologizing for her actions. They welcomed her back, glad to have their friend back.

Supergirl learned a valuable lesson that day. Power was tempting, but it was not worth losing oneself over. She vowed to never let her desires control her again.

She continued to fight for justice, using her experience as a reminder of the dangers of unchecked power. She had been down a dark path, but she had found her way back.

From that day forward, Supergirl was more cautious, more aware of her actions. She was stronger, not just physically, but mentally and emotionally as well.

She had faced her darkness and emerged victorious. She had become Darkseid, but in the end, she had also overcome him. She was Supergirl, and nothing could change that.

The Anti-Life Equation remained a mystery, but Supergirl was no longer interested in it. She had learned her lesson, and she was content with who she was.

She had become a symbol of hope once more, a beacon of light in the darkness. She was Supergirl, and she would continue to fight for justice, no matter what.

The universe was safe once more, and Supergirl was back, stronger than ever. She had overcome her dark destiny, proving that no matter how far one strays, there's always a way back.