Complex sentence: She had already staved off one attack from Sabertooth, by touching him and making him sick, but Harpon was about to kill her from a distance but was concussed by Apocalypse.
Split into simpler sentences: She had already staved off one attack from Sabertooth, by touching him and making him sick. Harpoon was about to kill her from a distance but was concussed by Apocalypse.