Aziraphale: Then… Then you tell me that you want to do this. You look me in the eye and tell me.
Crowley [convincingly]: I want to. I long to destroy the blameless children of blameless Job, just as I destroyed his blameless goats.
Aziraphale [believing Crowley]: Then God forgive you.
[As they are both walking away in different direction a bleating sound is heard. Aziraphale turnes and sees only crows... which proceed to bleat. Crowley watches Aziraphale. Aziraphale and Crowley glance at each other. Aziraphale makes a miracle and the crows turn to goats revealing that Crowley didn't destroy the goats but changed them into crows instead.]
Aziraphale [putting his hands on his hips, cheerily]: Well.
Yes, this is demon twins au. You know the trope, Ra's Al Ghul makes Damian and Danyal fight to the death. Now here's the humorous take
Damian loves killing his brother. Sure, the killing itself isn't fun, but what comes after? He loves it. Because in his pit madness, Danyal behaves like a badger. And Damian, inheriting his father's lack of self preservation, has absolutely no problem trying to wrangle the feral animal that is his brother