Trade By Batter.

If you can dish it out then you must be able to take it too. If the gods don't expect him to retaliate then they are in for quite a shock.

"Don't break now old friend," Aeternus said to his quivering claymore.

His claymore is not the only thing quivering from the energy overload. His soul is also being pushed to the limit of his ability trying to parse the attack. His soul reached its limit and came up short. There's just too much information and factors to consider if he intends to replicate that attack and even enhance it.

The attack of the GodSlayer is not some simple spell or even a complicated spell. He will take any type of spell right now. At least, spells have structures. Unfortunately, the attack of the GodSlayer is no spell. It is not a divine ability either. It is a chaotic phenomenon. It is 8 grand gods, 2 Celestials, and 5 Authorities smashing into him. How is he to copy the action of a getting to collide?