Complex sentence: Iblis and Sheba try to stop them, and the confrontation leads Iblis to curse Apollo by saying "may her soul curse you throughout eternity" before trying to kill Sheba, however, Apollo takes the blow and dies in her place.
Split into simpler sentences: Iblis and Sheba try to stop them, and the confrontation leads Iblis to curse Apollo by saying, "May her soul curse you throughout eternity." He then tries to kill Sheba; however, Apollo takes the blow and dies in her place.