For the longest time, Carol Danvers was powerless -- Ms. Marvel no more. Luckily, she had friends in the X-Men and they took her in and helped her the best they could. Even without powers, Carol was there to help the mutants in any way that she could. When she
was abducted by The Brood, they experimented on her and she ended up with new powers -- and a new name in Binary.
Her powers were linked to a white hole and she could generate heat, radiation and other forms of energy. The link was broken and she lost those powers, but her original powers returned and she took on the role of Warbird at that time to keep a low profile.