excaliber lost!

after a battle arthur was fast asleep in his bed when his sister morgan lafe came and took excaliber and when arthur awoke shortly afterword he realized that it was gone and he asked who was in there as he lay sleeping in his bed. he tracked her down and she through the sword into the a pond and went into a valley with many rocks and she used her dark magic to turn into a rock and they lost her and excaliber.