1) Banner of the Great Battle



Gives +400 movement for 1 day. Can be used once a week.

2) Stables



Until the end of the week, increases the hero's movement by +300, and also upgrades horses from the Castle to T2 knights for free. Can be used every week.

3) Well of Magic



Once a week, fully replenishes your hero's magicka.

4) Fort on a Hill



Upgrades units of levels 1-5 inclusive to T2 for double the gold cost.

5) City Gate



Works as a portal scroll to any of your castles, in one direction, your choice.

6) Warrior's Tomb



Randomly gives a good artifact or minus morale to your hero. 

Reward:



7) Black Market



Allows you to buy artifacts available on the market for gold and resources. 

8) Trading Post



Allows you to exchange resources and gold at a good rate, like on the castle market.

9) Cannon Yard



For gold, you can purchase more powerful artillery from the "Pier" castle.

10) Shrine of Magical Thought



From them, you can learn spells of various levels for your book of magic.

11) Military Equipment Factory



Ballista, tent, and additional shots for ranged units, for gold.

12) University



Depending on the assortment, for 2000 gold you can learn one of four secondary skills.