Spell Reversion
William didn't hesitate and gathered large amounts of Lightning Mana from the environment, simultaneously opening his Territory of Lightning to bring the most destruction to the area around Efretta.
In a split second, dozens of peak Tribulation Transcendence Realm Lightning Bolts formed and crashed down all around Efretta, some even breaking into the lower and middle stages of the Ascension Realm.
"That's all you've got? I expected better from you!" Efretta shouted as she channeled her own Territory of Lightning to counter William's.
Even with their Cultivation difference, Efretta still effortlessly held the upper hand. Her Mana exploded outward like miniature tsunamis, forming thick thunderclouds that put the Heavens' Tribulations to shame.