Play as Lu Bu
To get Lu Bu, fight Dong Zhou during the Dong Zhou story in an all out war when you move your own people. Take all your men and go straight for Lu Bu as soon as you find him. Once defeated, take the officer that has him to a very safe place and finish the rest of the level. Make sure to have powerful people by starting from the beginning, as Lu Bu has 108 war ability. Be sure to take Lu Bu quickly so there will be a better chance of getting him, and you do not have to execute him. Note: Sometimes Diao Chan will appear. Take her after defeating Lu Bu.