Killing Xanathar
After you slay the beast, you decide to leave the cave because you’ve had enough time in this cave for your entire life. You are about to open the door when it suddenly turns to dust, you quickly turn around to see one of the eye-stalks pointed at you. You run over to the beast and cut off all of the eyes just to make sure it can’t pull any more aces up its sleeve. Once you get out of the cave, you start to head back to the cave. When you get back, you are hailed as a hero and legends are told about you. You get promoted to the kings council.