(The last of the story weapons... I think)

The key of flame rests where the world's blood flows freely
The key of water rests where the ocean sleeps
The key of light rests where the blue star shines
The key of darkness rests where no light remains
The key of air rests with the Bard
The key of earth rests with me
With these six keys we locked away the great evil
Under the tallest tree in the deepest abyss