The Dragon King ruled over the entire world, and everyone was enslaved by him. Everyone was tired of his ruling, but no one stood up for themselves, for the fear of being killed.
One night, a small group of rebels formed in a deserted house out in the outskirts of the Dragon King's capital city. Most of the rebels were arguing over what to do and how to do it, when one of them pulled out the rare invisibility cloak.
The Dragon King had tried to get rid of all of the objects that could be used to challenge him, but he didn't search for them well enough. The group chose a young and beautiful woman in the group to be one of the Dragon King's personal "maidens".
The woman used the invisibility cloak to steal some formal attire, and she arrived to be selected as one of the King's personal maidens. Her facade had fooled them all, and she had won the selection.
After staying with the Dragon King long enough to gather some intelligence, she crept around one night with her invisibility cloak, and retrieved two small and concealable knives from the dungeon hidden below his palace. She then returned to her room, opened the window, and started scaling the brick wall until she was able to reach the window of the Dragon King's bedroom. She assassinated him while he was asleep. She left the castle quickly before dawn broke out.
At dawn, the news of the Dragon King being killed rung out throughout the entire kingdom, and the news kept on spreading until it reached throughout the entire world. Everyone cheered, danced, and sang. Everyone was free from the Dragon King's rule!
The kingdom would need a new leader though... someone who would respect the peoples' wishes and their rights. Too bad that a ruler like that would ever come to pass.... and if these new leaders happen to be as bad or even similar to the Dragon King.... they will meet a silent and deadly assassin.