Final answer:
King Arthur often overcomes powerful sorcerers in the legends.
Step-by-step explanation:
In the legends of King Arthur, the obstacle that he overcomes can vary depending on the specific story or version. However, one common obstacle that King Arthur often overcomes is A powerful sorcerer. In the stories, King Arthur encounters and triumphs over the magical powers and spells of sorcerers such as Merlin or Morgan le Fay. King Arthur's bravery, courage, and wisdom enable him to overcome these sorcerers and the challenges they present.