The Slave System is where players obtain Training Potions. 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.
Click on the harbor button to enter the harbor interface.
Click the "Slave Cage" button in order to enter the slave interface.
Select the player that you wish to capture.
You can also spend 10 gold to get more players to capture.
Enter the battle after selecting capture target. If the chosen player is another player's slave, you will have to fight against its master.
If you lose the battle, then you can’t capture the slave; if you win, you can capture the slave at once, ask him to work and obtain a Training Potion.