Complex sentence: The player is tasked by Wellan to travel to the center of the MadMaze and recruit the help of a wizard named Moraziel on the pretext that only with his help can the Mad One be defeated.
Split into simpler sentences: The player is tasked by Wellan to travel to the center of the MadMaze and recruit the help of a wizard named Moraziel. Only with his help can the Mad One be defeated.