Controls number of heroes you may have. The maximum level for the monument is rank four.
Cost To Upgrade
Rank
|
Resources cost
|
Time
|
Heroes
|
1
|
Free
|
15 seconds
|
3
|
2
|
|
|
4
|
3
|
|
|
5
|
4
|
5000 2000
|
4:00:00
|
8
|
2nd level enabled by conquering Floor 2 of the Tower.
3rd level enabled by conquering Floor 4 of the Tower.
4th level enabled by conquering Floor 13 of the Tower.