Quote from Flamebuster »I personally think a god's stats and abilities should be only as powerful as the devotion of their followers. Because, in "real life," a god is only as potent as the number of people who believe in them.
So maybe a tie-in to devotion or # of creatures of a specific type and/or something else maybe? That'd be cool if we do go that route in the next (few) set(s).
Eh, it differs from plane to plane, and from god to god. In Theros the gods are empowered by their worshipers (thus being enchantment creatures and use devotion), but in Amonkhet they are expressions of the leylines of the plane (as shown by Nissa's vision, and no devotion). Illhag appears to be some sort of elemental creature and an expression of Ravnica itself.
It's even more obvious in non-mtg fantasy games. In some realms the gods require worship to retain power, while in others, such as the Forgotten Realms, the gods will have power regardless of whether they are worshiped or not.