"The blue crystal of the white mountain that grows only an inch every hundred years lies in this sanctuary. It has the power to significantly affect any nearby water monsters."
The Water Sanctuary is a building which can only be bought in the Glory Shop. It increases the Attack Power of Water monsters owned by the player by 2% per building level. The bonus from this building is applicable in all areas.
The bonus ATK is calculated from the base stat of the monster and is additive with bonuses from runes, leader skills, and glory buildings.