Slave system is where players obtain Training Potion. In the system, players can challenge other players to become the master of the loser and gain such rewards as silver and vitality via fishing and castle.
As slave system is part of the harbour system, click harbour button to enter the interface.
Click “Labor Cage” to enter slave system interface.
Select the player that you wish to capture (you can also spend 10 gold having another bunch of players for selection)
Enter the battle after selecting capture target. If the chosen player is another one’s labour, you have to fight against its master.
If you failed the battle, then you can’t capture the slave; if you won, you can capture slave at once, ask him to work and obtain Training Potion.