The main reason the refurbished Domain Power System costs so much to use is that it must contend with Entropy. Entropy is disorder. It is harmful, and when an entity, object, or system reaches the limit of Entropy that it can withstand, it will fall apart.
For the rest of the world, the backlash of Entropy is unavoidable. When they produce power, interact with others, or interact with the world, they will produce Entropy.
Even he can't avoid Entropy completely. If someone attacks him, he will take on Entropy. If he falls, collides with an object, or is forced to give birth to a son through an egg that rips a chunk of his divinity away, he will be forced to take on Entropy.
The only form of Entropy he can avoid is the Entropy produced from producing power within himself and interacting with the world with his power. This is why he was willing to bear the burden of Entropy of the Domain Power System.
