Mystique regains her powers.
Since the cure eventually wears off, and that the mutants regain their abilities, then I guess it was just a matter of time Mystique should regain her normal blue form and her shape lifting abilities.
Mystique tossed and turned on her bed but she found herself unable to sleep. It was one in the morning but she still could not find sleep. She was growing tired of her condition. How did such a thing happen to her? She hated herself for what she had now become- a primitive homo sapiens. She had lost everything she had. She had taken so much time in accepting her true mutant nature and embracing it, and had spent almost all her teenage years trying to look normal. And now, all she had fought for was gone. She had built her identity around her mutant self and she had decided to become Mystique and get rid of Raven Darkholme. Now, she was neither one nor the other. Her family tried to kill her, and she had no place left to go. Mystique felt lost. She slowly got up and went under the shower. Warm water was usually the best thing to help her relax. She was wearing nothing but a black shirt and her panties. She was still not used to wear clothes. After all, she had spent her entire life avoiding wearing them. She undressed, and starred at herself at the mirror. She did not like what she saw- the fair skinned and dark haired woman staring back at her was not her true self. Still, she liked the feeling of being naked. It made her feel much more like herself. She slowly opened the water, and felt the warm water against her cold, human skin.
She stayed idle for a couple of minutes, and then reached out for the shower gel. She poured a tremendous amount all over her body and started to massage her jelly breast delicately, until they were complete covered by thick, soapy white foam. Then, she noticed something usual with her human skin. Her arms and legs were almost completely covered with rashes. These rashes were pale blue, like if someone had severely beaten her up. They looked like big bruises all over the body. "Is that a kind of human sickness?" thought Mystique sarcastically. Mystique had never been sick in her entire life, and she had no idea of what could be happening to her. She ran her fingers over her arm. The skin was a little bit rough. She washed away the rest of the soap and closed the water. She left the bathroom, and passed in front of the mirror without even glancing at it. If she had done so, she would have seen that her eyes were back to their usual yellow color. There was water still dripping of from her naked body as she did lie of her bed. She almost immediately felt asleep. And she had nightmares-
She dreamt about the night when she had to run away from her house, since her family had tried to kill her. She kept hearing a voice- a voice who sounded like her mother's. The voice told her that her family always hated her for being a mutant. And then, her last thing she saw was herself lying naked and powerlessly on the ground, begging for help while Magneto stared coldly at her. Then, everything went black and she felt like if she was falling into an endless dark hole.
Mystique woke up screaming.
Her whole body was in pain. She realized that she had fallen off bed, and that she was till completely naked as when she left the shower. She rose up, and then, something peculiar caught her attention. Her hands were back to blue, and her finger nails had reverted back to black. Her feet were blue too, with black toe nails.
She quickly rushed to the bathroom and stared for a long time and herself. She could not believe what she was seeing. Her eyes were back to their usual yellow color, and her skin was blue and scaly. Her arms, her legs, her face and her breasts were covered with blue scales. What had happened? Did the cure's effect wear off? She tried to see if she could till morph into someone- anyone. The first name that crossed her mind was magneto. But she decided to impersonate someone else. She concentrated for a moment, and then, tried to morph herself. Her blue scales quickly changed color and in no time, she was Wolverine's clone. She could not help but to smile dumbly and herself. Mystique was back. The cure eventually wore off.