Lady of the lake

in waters so still the lady of the lake
waited paitently for her knight a king
she had something to give he had to take
as he came her alluring voice began to sing
"what is your name my king Sir knight?"
"lady of the lake why Iam king Arthur!"
I need a weapon many foe I have to fight!"
"so you wish to wield the sword Excalibur?"
"many a night and day I have waited for thee!
"you know Excalibur is no ordinary sword!"
"there is a dificult test you must do for me
to prove your worthy of this gift my Lord?"