宫殿解锁禁卫军伯长部曲（imperial guard captain）
Mod introduction:
Add the palace unlock the forbidden guard master for the imperial court and thieves (similar to Sun Jian’s mercenary building unlock the mercenary Master)
1. level 4 palace unlocks the sabre wielding master, which is divided into five master parts according to five elements. Five Dragon armies can be recruited respectively
2. the five level palace unlocks the Imperial Guard master’s trilogy, which is divided into five master’s trilogy according to the five elements, and various imperial guards can be recruited respectively
