Guess That Warrior Cat!

Riddle #64

   @Sophiecat1234 guessed the last cat correctly! I am too lazy to remember it, or check. Here's the next riddle:

Was once one with the tunnels in the dirt,
Made sure to change the leader to prevent their clan from getting hurt.

Please read my new book: Guess That Medicine Cat! I am also looking for books to read in my leisure time. If you have written a book, and you'd like for me to read it, please tell me. Thxs! 😄

~Night