Forgath nodded as he considered.  So not only did Celestia successfully usurp her sister's influence, she was magically potent and clever enough to keep a trump card hidden away.  As a result, she was now the sole ruler of their nation after a failed coup by her sister.  And all that after having previously toppled King Sombra with her sister.  Forgath found that he was beginning to like this Princess.  Or would that be "Queen", now?  Either way, he would need to be careful with his southward expansion.