Excalibur (Real name "Caliburn") was originally the sword in the stone, drawn by a young Arthur to fulfill the legend of whoever pulled it free would be marked as the true King. The sword was later given to the lady for safe keeping until it was eventually reclaimed. After the death of King Arthur, following the final battle, the sword was taken back to the lake as instructed and tossed in, where the lady took it back and keeps it to this very day.