Obsidian

A long time ago Obsidian was a proud warrior that fighted along with the Wind Fea Dragons at the borders of their territory.
One evening when she flew beside the border she didn't notice that something were watching her. Suddenly a powerful blast threw her down to the ground, she tried to fly away to warn the others but she couldn't take of. The unknown creatures had a snake like appearance and sneaked like shadows along the terrain smirking at her seeing she laid there helpless. As the shadowlike creatures decided to slither beside her sounds of wings flapping were heard from close distance. She started to scream for assistance but just as she did the creatures started circling around her. She screamed a second time hearing the wind dragons get closer to help. But the shadowy creatures didn't seem startled and just as she looked one in the eyes she felt a weird sensation. She woke up from a sudden blackout and looked down seeing her scales surrounded by a shadowlike aura crawling into her scales. When the other faes finally arrived they couldn't recognize her and got struck with fear. She looked back at them reaching out for help but they did not seem to recognize her and pushed her out of their territory. Alone she had to survive without her wings, hate started to grow inside her heart, but then one day she got far into the woods. The longer she went the darker it went until she found herself in a place were no life seemed to thrive. She understood she had arrived at the Plaguebringers territory. She was scared that if other dragons would find her they would end her but when she got further she met three red eyed dragons, this is the end she though. But as they came closer they nodded and continued walking the other way. No one had a thought about that she wasn't from there since only the plague dragons where able to live in their forest without getting sick and weak. Obsidian then continued walking further in to the center of the scarred wasteland and met some welcoming plague dragons that saw she couldn't fly. They told her they could help her if she promised to bring them stolen treasures and she agreed.
She learned to fly again with her thorn wings and she stuck to her promise and stole some treasure from an elderly dragon. Obsidian got stronger and chose to stay in the pleague clan. Not long after that her wings was fully functional again.

But she promised herself to get revenge on the wind fighters one day because of how they betrayed her.