At the beginning of your precombat main phase, add X mana of any one color, where X is the number of Shrines you control.
Each Shrine has an ability that counts the number of Shrines you control. These abilities include the Shrine they’re printed on.
Shrines count only enchantments with the subtype Shrine. Other cards with “shrine” in their name (such as Jungle Shrine, Luxa River Shrine, and Nantuko Shrine) don’t count.