1) Star Axis



Increases the hero's magic power by +1.

2) Tree of Knowledge



For 2000 gold or 10 gems, increases the hero's level by +1.

3) Witch's Hut



Allows you to learn a random skill for the hero.

4) Stone of Knowledge



One-time grants +1000 experience to each hero per visit.

5) Colosseum of Mages



Gives a hero a choice of +2 to magic power or +2 to knowledge, once. 

6) Marletto Tower



One-time grants +1 defense for each hero.

7) School of War



For 1000 gold, increases each hero's attack or defense by +1, one-time.

8) Mercenary Camp 



Adds +1 to attack once for each hero.

9) Garden of Revelation



Adds +1 to knowledge once for each hero.