The knights attack the castle by stealth, killing the nine porters and the nine watchdogs, and enter the giant's hall. Upon their arrival, Ysbaddaden attempts to kill Culhwch with a poison dart, but is outwitted and wounded, first by Bedwyr, then by the enchanter Menw, and finally by Culhwch himself. Eventually, Ysbaddaden relents, and agrees to give Culhwch his daughter on the condition that he completes a number of impossible tasks ("anoethau"), including hunting the Twrch Trwyth and recovering the exalted prisoner, Mabon son of Modron, the only man able to hunt the dog Drudwyn, in turn the only dog who can track the Twrch Trwyth.