Complex sentence: Grayson then impales Sarrano on the wall of a ship, leaving him for dead, but Sarrano performs one final act: ejecting Grayson, Trishka and several of his men from the ship back onto the planet.
Split into simpler sentences: Grayson then impales Sarrano on the wall of a ship. As Grayson and Trishka regroup, Sarrano performs one final act: ejecting Grayson, Trishka and several of his men from the ship back onto the planet.