A powerful impact was caused by the collision of Jeremy's soul pressure as well as the aura shield that Haize had created. It was powerful enough to repel Jeremy and Haize backward but the one who suffered the most was Haize.
Although Haize managed to reduce the damage of Jeremy's attack using his soul shield by at least 90%, the 10% left caused his soul to be slightly damaged and that also disrupted the aura within his body, causing his recovery rate to become slower than before.
Not to mention, Haize was consuming his aura for not only his recovery but also for mobility. After all, Haize created aura limbs to compensate for his disabled state. Joshua's false divine energy proved to be much more of a threat to him than he had expected.
Haize was even using a secret technique to convert his lifespan into aura or else he wouldn't be able to keep up with the aura consumption rate. And if he no longer supplied his regeneration with his aura, he would without a doubt die.