The Musou Board is a way of rewarding the player for logging in. Each day you can visit an officer (shown in the "Current Officer") and talk to them to recieve one stamp on your board. If you do not check who is the "Officer of the day" you will not get your stamp as you have to visit their office. Every 5 stamps you can turn in your board to an officer of your choice to the bonus item listed and turning in a full board increased Trust with the officer.The board is only taken away when you fill the board (30 stamps), afterwords you are given a new board with new bonuses. After filling your second board (60 stamps total) you will be rewarded with a reincarnation orb by Zuo Ci.
During Campaign times, all Generals except the faction leader will not be in their office (they are in the battle field), and the faction leader is where you would get your stamp from during campaign.