Anime girl reading a book beneath a divided magical tree

a girl standing in the middle of the picture holding and reading a book, behind the girl stands a tree which on the right is dead and on the left is full of green leaves and flowers, on the right side of the picture we see a world covered with snow, ash and ruins, and on the left side we see a world full of life, a forest with a small village in the distance and a small lake, on the right side of the picture it is night and on the left side of the picture it is day, anime,