Each swing of the Light Sword that Larazul released created a shockwave of divine power, pushing everyone further away. The souls that resided in that place, all of them were purified by it and the place was turned upside down as if the world was being bounced up and down.
The mountains, the hills, and the ground were blown away by the fight between Mephis and Larazul. Although it was a total mess, Larazul protected them from getting killed in the fight by creating an impenetrable barrier. Mykel on the other hand was still on his spot, unmovable like a nail in a coffin and unaffected by the battle.
Mephis' magic was enough to block all the powerful attacks that Larazul threw at her, and her sword was powerful enough to withstand Larazul's Light Sword. She looked like she had the upper hand in the fight because Larazul couldn't use all her power with a mortal body. Larazul was holding back her power because she didn't want to destroy Zachary's body and soul.