Toggle Background Color

Level 1:
There once was a famous singer living in the Far East.
However, he lost the ability to sing in his later years.
A monk appeared by his side out of nowhere and whispered to the singer:
"you should pick up this sword."

Level 2:
"If you kill a single person with this sword you'll be able to sing one song.
If you kill two people you will sing two songs.
Go ahead and sing some unparalleled songs!"
The singer took the sword from the monk, hid in the night, and slashed at two bystanders.
The next day, the singer could produce beautiful songs, and regained his fame and fortune.

Level 3:
Afterwards, the singer sang a song for each person he killed, and sang two for every two he killed.
He continuously attained more fame and fortune.
However, his desires could no longer be suppressed.
If he killed the person most important to him, what kind of marvelous song would be produced?

Level 4:
And so the singer killed his wife and sang a song.
He killed several children and sang multiple songs.
He killed everyone in his family and sang and sang and sang.
He killed so many people on the streets that his songs could not keep up.
He killed and killed and killed and killed.
In the end, he didn't sing anything as he killed himself.

All that is left is the bloodstained sword.