Are these sentences worded properly?

FYI- Netherese and Shadovar are the same. Kleef and Arietta ordered Jang and the men-at-arms to free the Wave Wyvern from the reef and sail away from the islet before the Shadovar could return to the ship. The pair then left the Wave Wyvern on a little boat to assist their other companions, who had been forced to leave the Lonely Roamer after it was attacked by a large aquatic shadow monster that the Netherese had magically summoned. Arietta and Kleef saved Joelle, Malik, and Greatorm before they could be found by the Shadovar, and the group quickly made their way to shore in order to escape Yder’s sea monster and continue their mission.