It's just a statue, but more than a statue! Build it in your castle, it will inspire your heroes for more Exp from instances. Upgrade it for more Exp boost!
Place to cultivate your companions. Companions will get plenty Exp from cultivation!
Use gold and special items to synthesize rare items. Upgrade it to unlock more items.
Learn different technologies here. Technologies can boost your power, and bring you better production of resources.
When an enemy is here, you need an iron wall to protect yourself. Upgrade your wall to gain more life while being plundered!