Lake Salisbury

Lake Salisbury is a lake, known for having the highest concentration of magic power in all of Britannia.

Background
A legend says that a princess who lives in the lake bestowed a mysterious sword to a human king.

Trivia

 * The legend mentioned in the story is a reference to Lady of the Lake from the Arthurian Legends. This character is the one who gives Arthur his iconic sword, Excalibur.