Second in the world, how to kill skills?

You open the skill bar and turn to the page of divination and stall. There's a killing on it. If you open it, you can kill red. Red is only in PK mode, there are peace, strength, team, freedom and so on to choose from, on your avatar. You can choose different modes to attack different types of players. Once you attack, you will become popular and other players can kill you with impunity.