The MC dies and reincarnates into the Harry Potter Universe as Harry's twin sister. Both are powerful but have to learn to control their powers. Also is an alternative story line.

"Long ago, the world was filled with magic and everyone knew about it. One day, the magic disappeared, leaving no memory of it. Magic reemerged with the presence of witches and wizards. Thousands of years past and suddenly the embodiment of magic is needed to help fulfill a specific prophecy and so she awoke." My name is Lymris Azrael Nexus, this is the story of the child of magic.