Complex sentence: Afterwards, she was even more insane and driven for one purpose, serving the Highness Dukes to the point of creating the Org Heart that fused the Highness Dukes into Senki.
Split into simpler sentences: Afterwards, she was even more insane and driven for one purpose, serving the Highness Dukes. She then created the Org Heart that fused the Highness Dukes into Senki.