[Hueco Mundo]
Roof of Las Noches

Jehoel, distracted by the battle in front of him and several decades from his last pitched battle, fails to notice Niklaus for a mere instant. That moment is just long enough for Niklaus' tongue of flame to engulf him. It is a testament to the ancient Hollow's power and will that he does not scream or flail at the assault. The Cero fires as intended, arcing towards the Quincy army and detonating with extreme force. Immediately afterwards, Jehoel speeds away from Niklaus, at first beating futilely at the flames before rolling in an attempt to put them out. As this becomes obviously ineffective, he begins tearing strips of his flesh from his body, tossing the flaming chunks away from him as the flesh regrows.

For now, his regeneration is staving off the worst of the damage, but he is too busy to stop Niklaus.