Complex sentence: The book ends with him returning to his position as commander of the Galleykeep.The other ending is that the player gives the vapor to Marr, and with that the player kills Marr's right hand (although this is unseen).
Split into simpler sentences: The book ends with him returning to his position as commander of the Galleykeep. There is a second ending in which the player gives the vapor to Marr, and with that the player kills Marr's right hand (although this is unseen).