After clearing elite campagin stage 6 in each city, you unlock
a ruin for that city which provides additional boosts.
Ruins
Each ruin provides you with backup troop bonuses for that city
troop type. You can choose to display a maximum of three ruins
or monster statues combined.
These ruins and statues also provide you with bonuses even if they
are stored. However, they provide less bonus when stored.
These statues and ruins can be upgraded to a maximum level of 25.
Each upgrade increases the bonus and at level 25, you are able to
receive the full effect in storage.
Monsters
There are three types of monster statues:
To unlock these, you need to collect the appropriate shards.
Horned Altar - Used to boost for Fiend monster hunting.
Frozen Egg - Used to boost for Insect monster hunting.
Fang Spring - Used to boost for Mystic monster hunting.
These are helpful for when you are hunting monsters so it is recommended
that you display the specifici statue type when you are hunting a monster to
gain the full effects.
The ruins and statues are located in the Arcane Sanctum which is located towards
the west inside your castle.