Complex sentence: In the second season of the anime, she is the first victim of Mytho after the raven's blood in his heart possesses him and almost loses her heart, but Tutu is able to dance with her and save her from that fate.
Split into simpler sentences: In the second season of the anime, she is the first attempted victim of Mytho's--after the raven's blood in his heart possesses him--and she almost loses her heart. However, Tutu is able to dance with her and save her from that fate.