The Divine Favour rule is a new rule within SoB. Each time one side gets a 25 point bracket ahead Divine Favour kicks in, until the sides redress themselves. The rule drops/raises the Conquest value of Heroes by the winning side by one to a minimum of one. Hence if the Heroes are 50 points behind the Overlord, a 3 Conquest Hero is only worth 1 Conquest. Likewise if the Heroes are 50 points ahead of the Overlord , the same Heroes is worth 5 conquest Points.
The downside with this rule it that it can slow play down, and in an already very long campaign that's not necessarily a good thing.
One proposal is to simply raise the Conquest value of all actions performed by the losing side. Hence when Heroes are 50 points behind each Glyph they open is worth 5 (3 + 2) Conquest. If the Overlord is behind by 50 points, he gets 3 Conquest a week (before including any bonuses for Razed cities) This speeds the game up and also has the adavnatage that it is infinitely scalable