Complex sentence: Although victorious, the neko ninja lose many lives, as well as their leader; and while their work during the Dragon Bellow Conspiracy proves how invaluable they are, they are greatly weakened, and at risk of being replaced by the komori ninja.
Split into simpler sentences: Although victorious, the neko ninja lose many lives, as well as their leader. Although their work during the Dragon Bellow Conspiracy proves how invaluable they are, they are greatly weakened, and are at risk of being replaced by the komori ninja.