Merlin in “Lady of the Lake”

"I rode many miles until I came to a lake. And everywhere there was a mist. I had to stop. And when I did. out of the mist, a woman called to me, like a siren. From within the lake, she stretched out her arm, this sword, clutching it. I took the sword and thanked her. She smiled and slipped back into the water. And as she did she said, "This is the sword of King Arthur. This is Excalibur."