The god powers are among the many attractions of the game, so they could be shined more:
As you move into the mythic age, god powers are renewed:
Only if they were already used: ex. bolt, vision, etc., in case of powers that can be cast more times, they recover 50% of this.
The powers that give captured buildings are not renewed.
Similar to the shipments of age 3, being able to renew some of them when passing to the last age.
Being able to request the powers of the gods again from the temple, but at the cost of favor and gold. The more a power is requested, the more expensive it becomes. The powers that grant unique buildings can only be requested once more at most.