Asmodel

Zauriel, who had fallen in love with the woman he was tasked to protect, pleaded to be sent to Earth as a mortal, hoping to evade Asmodel as well as contact his beloved.

Superman (with the implied assistance of the Presence) eventually reversed the descent of the Moon and came to aid the League, but even he was barely able to hold off Asmodel.

Asmodel managed to return to Earth in the body of a small male child, attacking the Watchtower and killing the Martian Manhunter.

Finally realizing that there was no true way he could ever succeed where Lucifer had failed, Asmodel turned to Neron for help, but the demon abandoned the former King-Angel.

Etrigan the Demon used the ashes of an angel's wing feather to bond Asmodel to the Spectre-Force itself, a heavenly force of power.

[4] In his angelic form, Asmodel is invulnerable, has powerful reality-warping powers that could change the face of the world by force of will, can manipulate psionic energy, possesses unlimited telepathy and telekinesis, has total mental control over anyone or thing he wishes, has control over the weather or the elements and can command and transform energy and matter.

He is able to recover from injury practically instantaneously, and he has demonstrated superhuman physical strength rivaling, if not exceeding, that of the Martian Manhunter and Superman (in his Blue Energy form).