User blog comment:B214/Volume 23 discussion blog/@comment-201.215.165.7-20170614230627/@comment-1359322-20170615101010

Well to be exact, God's system probably played a big role in that.

"“I can only apologise for that. ……..After God had been annihilated, only the system to govern divine protection, mercy and miracles remained. This system was, if I explain it simply, the system to perform the miracles etc. God did. God made the system, used it to bring about miracles above ground. To bring about the effect of holy things like exorcism, crosses etc. these too are the system’s powers.”"

- Volume 4

The system remained even after that as seen with the SG, so it may actually mean that God is more of an inventor than fighter.

Of course Michael did say:

"“To be honest, it takes a big toll on anyone who uses it with the exception of God. With me as the centre, everyone of the Seraph was able to somehow start up the system but….. compared to the time God existed, the divine protection and mercy to those who believe in God is not complete. It’s an unfortunate thing but, those who can be granted salvation are limited.”"

But the system is incomplete and has bugs in it still, so that may be the reason why it place a toll on others using it.