Aziraphale's head snaps back with the push, striking the tree, the pain of his ravaged wings momentarily blacking out his vision. It swims back in spots, through which the terrifying calm of Lucifer's face becomes vivid and too close.

Lucifer lays into him, and he can barely keep up, struggling back against him, occasionally landing a blow in return but mostly failing to keep blows from touching him. He can taste blood now. The point where his wings meet his back is just a mass of pressure and agony, out from which more waves of pain ripple through him. He should surrender. He should beg for mercy. But he's stupid, and defiant, he will not stand down to the Devil.

He manages to catch Lucifer's arm and strikes harder than before, reining in as much power as he can, aiming to knock Lucifer back.